Add a dropdown list of vendors to the app submit page. Automatch the dropdown

vendor selection on the admin side of there is an exact or partial name match.
Clear out the vendor field if a match is found.
Display username when logging in to the db.

account.php

@@ -184,7 +184,7 @@ function cmd_do_login()
     if($result == null)
 	{
 	    $current = $user;
-	    addmsg("You are successfully logged in.", "green");
+	    addmsg("You are successfully logged in as '$user->username'.", "green");
 	    redirect(apidb_fullurl("index.php"));    	    
 	}
     else