Enhance - More messages::add updates (#2662)

convert more messages over to messsagse::add

core/databases/database_delete.php

@@ -54,7 +54,7 @@ else {
 	}
 
 //redirect the browser
-	$_SESSION["message"] = $text['message-delete'];
+	messages::add($text['message-delete']);
 	header("Location: databases.php");
 	return;