Fix #12869. Zoom the body after support tests; avoids layout changes …

…in IE8/9/10 in IE7 mode. Close gh-1025.

src/support.js

@@ -254,7 +254,9 @@ jQuery.support = (function() {
 			div.firstChild.style.width = "5px";
 			support.shrinkWrapBlocks = ( div.offsetWidth !== 3 );
 
-			container.style.zoom = 1;
+			// Prevent IE 6 from affecting layout for positioned elements #11048
+			// Prevent IE from shrinking the body in IE 7 mode #12869
+			body.style.zoom = 1;
 		}
 
 		// Null elements to avoid leaks in IE