SPFx Docs Refresh: sections "Migrating existing customizations" & "Guidance" (SharePoint#5977)

* refresh "migrate existing SEWP's to SPFx"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* refresh angularjs=>spfx article

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refresh "SPFx jquery+datatables tutorial"

- update tutorial to SPFx v1.10
- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score
- removed any instances at the end of docs with instructions to submit issues with the docs to the sp-dev-docs issue list
  - all docs have a commenting feature in the footer that handles this - better for people to use this if they find issues as the issue will be associated with the document

* Refresh "Migrating user custom actions and ECB menu items to SharePoint Framework Extensions"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refresh "Work with __REQUESTDIGEST"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refresh "Connect to SharePoint using the JavaScript Object Model (JSOM)"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Migrating JSLink customizations to SharePoint Framework Field Customizers"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Add new doc "Enable the Microsoft 365 CDN"

- these steps were mentioned in a few places, centralized the doc

* Remove dupe steps to setup M365CDN to point to new page

* Refresh "Tutorial - Migrating from Edit Control Block (ECB) menu item to SharePoint Framework Extension"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Tutorial - Migrating from JSLink to SharePoint Framework extensions"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Tutorial - Migrating from UserCustomAction to SharePoint Framework extensions"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score
- removed any instances at the end of docs with instructions to submit issues with the docs to the sp-dev-docs issue list
  - all docs have a commenting feature in the footer that handles this - better for people to use this if they find issues as the issue will be associated with the document

* Refreshed "Migrate jQuery and FullCalendar solution built using Script Editor web part to SharePoint Framework"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- removed unnecessary images
- updated instances of the SPFx Yeoman generator prompts:
  - standardized the way the prompts are shown in the docs
  - removed images of the prompts (for future maintainability simplicity)
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score
- removed any instances at the end of docs with instructions to submit issues with the docs to the sp-dev-docs issue list
  - all docs have a commenting feature in the footer that handles this - better for people to use this if they find issues as the issue will be associated with the document

* address build report anomalies

* Fix bullet typo

* Refreshed "Guidance/SharePoint Framework enterprise guidance"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Guidance/Team-based development on the SharePoint Framework"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Guidance / SharePoint Framework solutions governance considerations"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop

* Refreshed "Guidance /  SharePoint Framework guidance on dynamic loading of packages"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Guidance / Connect SharePoint Framework components using dynamic data"

- fixed grammar / spelling issues
- added 1px gray border to all images with white/black backgrounds
  - required by MSDocs so it's clear to the reader, regardless of the theme they have selected for MSDocs (light/dark), where images start/stop
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Hyperlinking considerations in SharePoint Framework"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Guidance / Intercepting Query String Changes in Web Parts"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

* Refreshed "Guidance / SharePoint Framework development tools and libraries compatibility"

- fixed grammar / spelling issues
- cleaned up markdown issues
  - bullet usage
  - code listings
  - correct usage of italic, bold, & inline code formats
- improved Acrolinx score

Author: andrewconnell