About: Make sure the images are properly responsive.

props ocean90.
see #29494.


git-svn-id: https://develop.svn.wordpress.org/trunk@29708 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/about.css

@@ -25,6 +25,7 @@
 .about-wrap img {
 	margin: 0;
 	max-width: 100%;
+	height: auto;
 	vertical-align: middle;
 }
 
@@ -442,4 +443,4 @@
 		width: 100%;
 		float: none;
 	}
-}
+}