Created attachment 71478 [details]
Screenshot of the dialog with a long short name

Problem description: 

After inserting a very long short name, buttons in Insert Bibliography Entry do not respond to the mouse, and the keyboard has to be used instead.


Steps to reproduce:
1. Create a new document
2. Insert a new bibliography entry
3. Select "from document content", and New
4. Select Type "Article" (this is probably irrelevant), and as short name use a very long name, like:
    1234567890123456789012345678901234567890123456789012345678901234567890

5. Click on OK.
6. Click on Insert.


Current behavior:

Nothing happens. None of the buttons of the "Insert Bibliography Entry" dialog respond to the mouse click. However, using tab and space/enter, all the options can be selected (insert, edit, etc).

Usually the dialog works correctly. But at least in this case, I need to use the keyboard. The first time that I have observed this behavior is in LO 4.0.0.0 beta 1. LO 3.6.4 used to work perfectly.

Sometimes a long short name works, but I have seen this error a few times, and I have been able to reproduce it with the steps mentioned above.


Expected behavior:

The buttons in the "Insert Bibliography Entry" dialog should respond to the mouse click as well as the keyboard.
Operating System: Ubuntu
Last worked in: 3.6.4.3 release