Merge pull request #17293 from owncloud/revert-z-index

Revert z-index changes

core/css/apps.css

@@ -410,7 +410,6 @@
 	position: relative;
 	height: 100%;
 	overflow-y: auto;
-	z-index: 100;
 }
 
 #app-content-wrapper {
@@ -556,3 +555,4 @@ em {
 	z-index:500;
 	padding:16px;
 }
+

core/css/share.css

@@ -161,7 +161,6 @@ a.showCruds:hover,a.unshare:hover {
 	max-height:103px;
 	overflow-y:auto;
 	overflow-x:hidden;
-	z-index: 101 !important;
 }
 
 .notCreatable {