"Add" button is still greyed out after right-clicking and "Select All" when adding files to an archive

[PyGeek03]

I encountered this bug while trying to add all files in a folder to an archive. I expect that after selecting "Select All", then the "Add" button would be usable, but it did not. Here's the step to reproduce this bug:
- On the menu bar, click "Edit". Select "Add Files...". The "Add" button is greyed out.
- Navigate to the folder containing the files.
- Right-click and select "Select All". The "Add" button remains unchanged.
To enable the "Add" button, I have de-select a random checkbox.
I'm using file-roller version 3.16.5-0ubuntu1.1 on Xubuntu 16.04.1 LTS.

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.