Revert "fixes #170559 (#170567)" (#172491)

This reverts commit fb26225.

src/vs/base/parts/quickinput/browser/quickInputList.ts

@@ -119,6 +119,11 @@ class ListElementRenderer implements IListRenderer<ListElement, IListElementTemp
 
 		// Checkbox
 		const label = dom.append(data.entry, $('label.quick-input-list-label'));
+		data.toDisposeTemplate.push(dom.addStandardDisposableListener(label, dom.EventType.CLICK, e => {
+			if (!data.checkbox.offsetParent) { // If checkbox not visible:
+				e.preventDefault(); // Prevent toggle of checkbox when it is immediately shown afterwards. #91740
+			}
+		}));
 		data.checkbox = <HTMLInputElement>dom.append(label, $('input.quick-input-list-checkbox'));
 		data.checkbox.type = 'checkbox';
 		data.toDisposeTemplate.push(dom.addStandardDisposableListener(data.checkbox, dom.EventType.CHANGE, e => {
@@ -350,6 +355,12 @@ export class QuickInputList {
 
 			this._onKeyDown.fire(event);
 		}));
+		this.disposables.push(this.list.onMouseDown(e => {
+			if (e.browserEvent.button !== 2) {
+				// Works around / fixes #64350.
+				e.browserEvent.preventDefault();
+			}
+		}));
 		this.disposables.push(dom.addDisposableListener(this.container, dom.EventType.CLICK, e => {
 			if (e.x || e.y) { // Avoid 'click' triggered by 'space' on checkbox.
 				this._onLeave.fire();