Twenty Eleven: Set a fixed height for search form when header image is added.

This ensures that the search form does not collide with the menu on smaller screens.

Props sabernhardt, fedepia, Soean, lukecavanagh, mukesh27.
Fixes #40398.

git-svn-id: https://develop.svn.wordpress.org/trunk@51807 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/themes/twentyeleven/style.css

@@ -701,6 +701,7 @@ a.assistive-text:focus,
 	top: auto;
 	bottom: -27px;
 	max-width: 195px;
+	height: 32px;
 }
 #branding .only-search + #access div {
 	padding-right: 205px;