Fix cmd terminal link hint on mac

Part of #23522

src/vs/workbench/parts/terminal/electron-browser/media/xterm.css

@@ -56,12 +56,12 @@
 	text-decoration: none;
 }
 
-.monaco-workbench .panel.integrated-terminal.ctrl-held .xterm a:hover {
+.monaco-workbench .panel.integrated-terminal.ctrlcmd-held .xterm a:hover {
 	cursor: pointer;
 	text-decoration: underline;
 }
 
-.monaco-workbench .panel.integrated-terminal.ctrl-held .xterm a.xterm-invalid-link:hover {
+.monaco-workbench .panel.integrated-terminal.ctrlcmd-held .xterm a.xterm-invalid-link:hover {
 	cursor: text;
 	text-decoration: none;
 }

src/vs/workbench/parts/terminal/electron-browser/terminalPanel.ts

@@ -148,9 +148,9 @@ export class TerminalPanel extends Panel {
 	}
 
 	private _attachEventListeners(): void {
-		this._register(DOM.addDisposableListener(window, DOM.EventType.KEY_DOWN, (e: KeyboardEvent) => this._refreshCtrlHeld(e.ctrlKey)));
-		this._register(DOM.addDisposableListener(window, DOM.EventType.KEY_UP, (e: KeyboardEvent) => this._refreshCtrlHeld(e.ctrlKey)));
-		this._register(DOM.addDisposableListener(window, DOM.EventType.FOCUS, (e: KeyboardEvent) => this._refreshCtrlHeld(e.ctrlKey)));
+		this._register(DOM.addDisposableListener(window, DOM.EventType.KEY_DOWN, (e: KeyboardEvent) => this._refreshCtrlHeld(e)));
+		this._register(DOM.addDisposableListener(window, DOM.EventType.KEY_UP, (e: KeyboardEvent) => this._refreshCtrlHeld(e)));
+		this._register(DOM.addDisposableListener(window, DOM.EventType.FOCUS, (e: KeyboardEvent) => this._refreshCtrlHeld(e)));
 		this._register(DOM.addDisposableListener(this._parentDomElement, 'mousedown', (event: MouseEvent) => {
 			if (this._terminalService.terminalInstances.length === 0) {
 				return;
@@ -203,8 +203,8 @@ export class TerminalPanel extends Panel {
 		}));
 	}
 
-	private _refreshCtrlHeld(ctrlKey: boolean): void {
-		this._parentDomElement.classList.toggle('ctrl-held', ctrlKey);
+	private _refreshCtrlHeld(e: KeyboardEvent): void {
+		this._parentDomElement.classList.toggle('ctrlcmd-held', platform.isMacintosh ? e.metaKey : e.ctrlKey);
 	}
 
 	private _updateTheme(theme?: ITheme): void {