Remove unnecessary transparency on update notification and column selection.

Keep the update message closed for 1 hour if close button is clicked. Will reset if manual update check is done.
Don't ignore user logging when doing import (we still need an option in the import to override this).

data/interfaces/default/css/dataTables.colVis.css

@@ -72,7 +72,7 @@ ul.ColVis_collection {
 	width: 150px;
 	padding: 8px 8px 4px 8px;
 	margin: 10px 0px 0px 0px;
-	background-color: rgba( 88, 88, 88, 0.8 );
+	background-color: #444;
 	overflow: hidden;
 	z-index: 2002;
 }