Core: Access offsetHeight on div for support tests to avoid a layout …

…bug in IE 9. Fixes #8026 - minHeight support test affects page layout in IE 9.

(cherry picked from commit 956c2cd)

ui/jquery.ui.core.js

@@ -225,6 +225,11 @@ $(function() {
 	var body = document.body,
 		div = body.appendChild( div = document.createElement( "div" ) );
 
+	// access offsetHeight before setting the style to prevent a layout bug
+	// in IE 9 which causes the elemnt to continue to take up space even
+	// after it is removed from the DOM (#8026)
+	div.offsetHeight;
+
 	$.extend( div.style, {
 		minHeight: "100px",
 		height: "auto",