Bug 13835: Popup with searches: results hidden by language menu in footer

Bug 13835: Popup with searches: results hidden by language menu in footer

Language menus in pop up windows are not necessary and can hide the contents
(especially search results) on a narrow screen.

For an example, see screenshot in comment #3

This patch allows to mark pop p menus not to display the language footer.

To test:

- Reproduce issue from comment #3
- Apply patch
- Try to reproduce issue from comment #3
  -> language menu should no longer display
- Verify that language menu is suppresed in 'Add to ist' as well
  (from catalog search results, select an item, Add to:...)

Note: There will be more pop-ups with unwnated language selector.
      That can be resolved in follow up bugs.

Followed test plan which worked as intended
Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Mason James <mtj@kohaaloha.com>