You could decide if your topbar lists (Bars, User Top Bars, ..) have got a default link as http://path/page# or link to their name..

Syntax

$wgTopBarLink = false;

You obtain that all topbar lists (Bars, User Top Bars, ..) have got a default link as http://path/page#.. as Toolbox default link in default mediawiki system.

$wgTopBarLink = true;

You obtain that all topbar lists (Bars, User Top Bars, ..) have got a default link as Bars, User Top Bars, .. instead Toolbox, User tools, Page tools have got a default link as http://path/page#.

$wgTopBarLink = "User_Top_Bars";

You obtain that all topbar lists (Bars, ..) have got a default link as http://path/page# but User Top Bars has got a link to User Top Bars page.