Mouse: Fix delay timeout clearing upon mouseup

Fixes #14458
Closes gh-1579

Author: lsharir

ui/widgets/mouse.js

@@ -179,6 +179,11 @@ return $.widget("ui.mouse", {
 			this._mouseStop(event);
 		}
 
+		if (this._mouseDelayTimer) {
+			clearTimeout(this._mouseDelayTimer);
+			delete this._mouseDelayTimer;
+		}
+
 		mouseHandled = false;
 		return false;
 	},