Fixes width of the dropdown menus as per computed styles.

apps/files_versions/css/versions.css

@@ -1,5 +1,5 @@
 #dropdown.drop-versions {
-	width:384px;
+	width:320px;
 }
 
 #found_versions li {

core/css/share.css

@@ -11,7 +11,7 @@
 	margin-right:112px;
 	position:absolute;
 	right:0;
-	width:400px;
+	width:320px;
 	z-index:500;
 	padding:16px;
 }