Make ligatures a preview setting

Author: Tyriar

src/vs/platform/terminal/common/terminal.ts

@@ -116,7 +116,7 @@ export const enum TerminalSettingId {
 	SmoothScrolling = 'terminal.integrated.smoothScrolling',
 	IgnoreBracketedPasteMode = 'terminal.integrated.ignoreBracketedPasteMode',
 	FocusAfterRun = 'terminal.integrated.focusAfterRun',
-	ExperimentalFontLigatures = 'terminal.integrated.experimental.fontLigatures',
+	FontLigatures = 'terminal.integrated.fontLigatures',
 
 	// Debug settings that are hidden from user
 

src/vs/workbench/contrib/terminal/browser/xterm/xtermTerminal.ts

@@ -718,7 +718,7 @@ export class XtermTerminal extends Disposable implements IXtermTerminal, IDetach
 		if (!this.raw.element) {
 			return;
 		}
-		if (this._terminalConfigurationService.config.experimental?.fontLigatures) {
+		if (this._terminalConfigurationService.config.fontLigatures) {
 			if (!this._ligaturesAddon.value) {
 				this._xtermAddonLoader.importAddon('ligatures').then(LigaturesAddon => {
 					if (this._store.isDisposed) {

src/vs/workbench/contrib/terminal/common/terminal.ts

@@ -207,9 +207,9 @@ export interface ITerminalConfiguration {
 	smoothScrolling: boolean;
 	ignoreBracketedPasteMode: boolean;
 	rescaleOverlappingGlyphs: boolean;
+	fontLigatures?: boolean;
 	experimental?: {
 		windowsUseConptyDll?: boolean;
-		fontLigatures?: boolean;
 	};
 }
 

src/vs/workbench/contrib/terminal/common/terminalConfiguration.ts

@@ -171,9 +171,10 @@ const terminalConfiguration: IConfigurationNode = {
 			markdownDescription: localize('terminal.integrated.fontFamily', "Controls the font family of the terminal. Defaults to {0}'s value.", '`#editor.fontFamily#`'),
 			type: 'string'
 		},
-		[TerminalSettingId.ExperimentalFontLigatures]: {
-			'description': localize('terminal.integrated.fontLigatures', "Controls whether font ligatures are enabled in the terminal."),
-			'type': 'boolean',
+		[TerminalSettingId.FontLigatures]: {
+			description: localize('terminal.integrated.fontLigatures', "Controls whether font ligatures are enabled in the terminal."),
+			type: 'boolean',
+			tags: ['preview'],
 			'default': false
 		},
 		[TerminalSettingId.FontSize]: {