objectbrowser/bulk_delete - minor bugfix

fix an error when user would select items to delete,
then click "delete" without checking "i am sure" the objects
would duplicate before but no longer.

Fixes #257
status - fix recheck in status detail

Make sure that when you click recheck in status_detail
the selection is not cleared and buttons remain enabled.

Fixes #292
status.utils - new method get_hostgroups
improvements to autocomplete rest calls

Issue #156
Issue #278