collect up all the piece of data that the dispatch requires and launch
it in an idle. So if a dialog appears its embedded mainloop will not return
to body if the deleted SvxHyperlinkNewDocTp

Change-Id: Ie978bc552c3b88dc11eae2ec49417cc8bd0f02bc
Reviewed-on: https://gerrit.libreoffice.org/53056Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>