Progressbar demo (label): Use absolute positioning for the label. Fix…

…es #9163 - Progressbar demo: Incorrect presentation with progressbar label in IE9.

demos/progressbar/label.html

@@ -10,10 +10,13 @@
 	<script src="../../ui/jquery.ui.progressbar.js"></script>
 	<link rel="stylesheet" href="../demos.css">
 	<style>
+	.ui-progressbar {
+		position: relative;
+	}
 	.progress-label {
-		float: left;
-		margin-left: 50%;
-		margin-top: 5px;
+		position: absolute;
+		left: 50%;
+		top: 4px;
 		font-weight: bold;
 		text-shadow: 1px 1px 0 #fff;
 	}