src/vs/editor/contrib/suggest/browser/suggestWidget.ts/SuggestWidget/_onEditorMouseDown
class SuggestWidget:	private _onEditorMouseDown(mouseEvent: IEditorMouseEvent): void {
		if (this._details.widget.domNode.contains(mouseEvent.target.element)) {
			// Clicking inside details
			this._details.widget.domNode.focus();
		} else {
			// Clicking outside details and inside suggest
			if (this.element.domNode.contains(mouseEvent.target.element)) {
				this.editor.focus();
			}
		}
	}