Committer's note: this is forward ported from 5.2+backports branch, with
numerous conflicts.

tdf#101856 add new checkbox/editfield for hidden/condition attrs
Conflicts:
	sw/uiconfig/swriter/ui/insertbookmark.ui
Author: Bernhard Widl <bernhard.widl@cib.de>
(cherry picked from commit c347e008)

tdf#101856 Fix crash in Insert Bookmark dialog
Author: Serge Krot <Serge.Krot@cib.de>
Reviewed-on: https://gerrit.libreoffice.org/50616Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
(cherry picked from commit bcc16920)

Change-Id: Ib1df7a4c1477693aa2d0ec067635cdcbd393cebd
Reviewed-on: https://gerrit.libreoffice.org/46820
Tested-by: Jenkins
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>