Update control-attachments.md

Adding the reset property to attachments and its usage.

Author: chmoncay

powerapps-docs/maker/canvas-apps/controls/control-attachments.md

@@ -64,6 +64,8 @@ An **Attachments** control lets you open, add, and delete files from a SharePoin
 
 **NoAttachmentsText** – Informational text shown to the user when there are no files attached.
 
+**Reset** – Reverts all changes to the attachments control returning to the previously saved state.
+
 **[TabIndex](properties-accessibility.md)** – Keyboard navigation order in relation to other controls.
 
 **[Visible](properties-core.md)** – Whether a control is visible or hidden.
@@ -116,6 +118,6 @@ The following properties must be present:
 ### Keyboard support
 * **[TabIndex](properties-accessibility.md)** must be zero or greater so that keyboard users can navigate to it.
 * Focus indicators must be clearly visible. Use **[FocusedBorderColor](properties-color-border.md)** and **[FocusedBorderThickness](properties-color-border.md)** to achieve this.
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-
-[!INCLUDE[footer-include](../../../includes/footer-banner.md)]
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+[!INCLUDE[footer-include](../../../includes/footer-banner.md)]