src/vs/base/browser/ui/selectBox/selectBoxCustom.ts/SelectBoxList/onListBlur
class SelectBoxList:	private onListBlur(): void {
		if (this._sticky) { return; }
		if (this.selected !== this._currentSelection) {
			// Reset selected to current if no change
			this.select(this._currentSelection);
		}

		this.hideSelectDropDown(false);
	}