Show tooltip before positioning it to fix scrolling issue, then hide again before animation

Author: jzaefferer

ui/jquery.ui.tooltip.js

@@ -104,9 +104,9 @@ $.widget("ui.tooltip", {
 		this.tooltip.css({
 			top: 0,
 			left: 0
-		}).position($.extend(this.options.position, {
+		}).show().position($.extend(this.options.position, {
 			of: target
-		}));
+		})).hide();
 
 		this.tooltip.attr("aria-hidden", "false");
 		target.attr("aria-describedby", this.tooltip.attr("id"));