fdo#44081 don't remove 'edit' pop-up menu entry from form in design mode

Conflicts:
	sw/source/core/uibase/app/docsh.cxx

Change-Id: I009b0e1a155c298bd7f461547125df4ba76805d9
Reviewed-on: https://gerrit.libreoffice.org/11232
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>