Announce the whole LibreOffice word count dialog content
requested to merge michaelweghorn/orca:michaelweghorn/announce_libreoffice_word_count_dialog into master
Don't filter out labels with the same name and lower the minimum word count that a label in a dialog needs to have in order to be announced (s. the single commits for more details).
This is needed to make sure the whole content of the word count dialog in LibreOffice Writer gets announced.
Fixes: #419 (closed)