Fix Tracker Tabular global variable clash
- [FIX] trackers: Since the Smarty 5 changes (i think) menus now use the global Smarty var
$list
which gets set after the controleraction_manage
function is called but before the template is rendered - maybe, so renaming the var avoids that... there probably is a better fix elsewhere as these common var names often clash (like$user
for instance)