Media Grid: Remove fields from showing in the grid itself.

All details are still available within the modal, and less-distinguishable non-image files still show the filename along with the file type icon.

Reverts [29079], [29078], [29077], and [28995]. see #24716.


git-svn-id: https://develop.svn.wordpress.org/trunk@29280 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/common.css

@@ -1333,7 +1333,6 @@ form.upgrade .hint {
 	display: none;
 	margin: 0 20px -1px 0px;
 	position: relative;
-	z-index: 10;
 	background-color: #fff;
 	border: 1px solid #ddd;
 	border-top: none;
@@ -1356,7 +1355,6 @@ form.upgrade .hint {
 #screen-meta-links .screen-meta-toggle {
 	position: relative;
 	top: 0;
-	z-index: 10;
 }
 
 #screen-meta-links a {