Description:
If a user wants to set different borderstyles to a group of cells it is not obvious how to do so.

Steps to Reproduce:
1. Select a group of cells (at least 2x2).
2. Open the cell formatting dialog (Ctrl+1).
3. Select the double-line border and set as the outer border using the button at the top of the screen.
4. Select the horizontal inner line of the group and select the single-line border.
5. Select the vertical inner line of the group.
6. Click OK and see the result. Only the vertical inner line has a single-line border.
7. Repeat steps 1 to 5.
8. Click on the horizontal inner line again. 
9. Click OK and see the result. Now both horizontal and vertical inner lines have a single-line border.

Actual Results:
The result at step 6 is what I would logically do, but it results in a horizontal inner border with a double-line.

Expected Results:
The result at step 9 is what I would expect to be the state at step 6.


Reproducible: Always


User Profile Reset: No



Additional Info:
I discovered this behaviour after reading a question on the LibreOffice User Group on Facebook.