Merge branch '5682-save' into 'stable-3.1'

Go back to user settings on save

See merge request ispconfig/ispconfig3!1085

Author: Till Brehm

interface/web/tools/form/user_settings.tform.php

@@ -68,7 +68,7 @@
 $form['db_table_idx'] = 'userid';
 $form["db_history"]  = "no";
 $form['tab_default'] = 'users';
-$form['list_default'] = 'index.php';
+$form['list_default'] = 'user_settings.php';
 $form['auth']   = 'no';
 
 //* 0 = id of the user, > 0 id must match with id of current user