Position: Increase scrollbar test div to handle larger scrollbars

Fixes #15106
Closes jquerygh-1811

Author: scottgonzalez

ui/position.js

@@ -84,9 +84,9 @@ $.position = {
 			return cachedScrollbarWidth;
 		}
 		var w1, w2,
-			div = $( "<div " +
-				"style='display:block;position:absolute;width:50px;height:50px;overflow:hidden;'>" +
-				"<div style='height:100px;width:auto;'></div></div>" ),
+			div = $( "<div style=" +
+				"'display:block;position:absolute;width:200px;height:200px;overflow:hidden;'>" +
+				"<div style='height:300px;width:auto;'></div></div>" ),
 			innerDiv = div.children()[ 0 ];
 
 		$( "body" ).append( div );