[rt-users] Adding new tabs

[Stephen Turner]

I'd like to add a tab to the left-hand navbar that would appear on all RT 
pages. In /Elements/Tabs I see this:

   # Now let callbacks add their extra tabs
   $m->comp('/Elements/Callback',
     topactions => $topactions,
     toptabs => $toptabs, %ARGS);

but I'm at a loss as to how to create such a callback.

Has anyone done this? We are using RT 3.1.14.

Thanks,
Steve