No icons are displayed when I try to select desired border for table cell:
1. insert a table
2. click on Borders on Table toolbar
3. 8 white square appear. Expected: 8 icons
Created attachment 45760 [details]
8 white squares
This is probably caused by the same root cause as Bug 36263, but I'll let Tor decide.
*** This bug has been marked as a duplicate of bug 36263 ***