Created attachment 163736 [details]
Screenshot of the current situation
Some properties are NULL (likely not set) but at the same time do not have any label. The same is true for the minus (?) icon.
All possible properties should be labelled (considering l10n) and empty results shown as no string. The design proposal is in bug 135270.
Guess supressing NULL is a nobrainer and done within minutes.
In the https://bugs.documentfoundation.org/show_bug.cgi?id=135270 NULL is existed on the UI. So I thought it was correct, but as you said it is a little patch. I'm working and sending a patch.
Yusuf Keten committed a patch related to this issue.
It has been pushed to "master":
tdf#135273: Tight integration dialog shows unclear properties
It will be available in 7.1.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.
Yusuf, after submitting a patch that solves the issue please also resolve the BZ ticket as fixed.