Hover Delay Fix (microsoft#205665)

fix microsoft#205658

Author: benibenj

src/vs/base/browser/ui/iconLabel/iconLabelHover.ts

@@ -180,6 +180,7 @@ export function setupCustomHover(hoverDelegate: IHoverDelegate, htmlElement: HTM
 		}
 		if (hadHover) {
 			hoverDelegate.onDidHideHover?.();
+			hoverWidget = undefined;
 		}
 	};