Bug 34131: Add 'current' class on correct side menu link

Bug 34131: Add 'current' class on correct side menu link

This changes the way we're looking for the correct menu item to set as
active.

If we don't find an exact match for path+params, we attempt to set
'current' to just matching on path.

What this does is it sets the 'Plugins' menu item as active, even if
the url is 'plugins-home.pl?method=report

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>