resizable visual test: changed alsoResize child test to have position…

…:absolute parent and position:relative child. This is the source of the dialog issue #5323 - dialog content shifts when dialog resized from top or left

tests/visual/resizable/resizable_option_alsoResize_child.html

@@ -19,13 +19,15 @@
 	</script>
 	<style type="text/css">
 	#parentDiv {
+		position: absolute;
 		padding: 1em;
 		width: 200px;
 		height: 200px;
 		background: silver;
 		border: 1px solid gray;
 	}
 	#childDiv {
+		position:relative;
 		padding: 1em;
 		border: 1px solid gray;
 	}