@bvbfan The patch seemed to work, and it looks great now. Although, it also had some other impact, changing the background color doesn't work as supposed to. It seems that the fix changed the pattern to solid white, so changing the background color doesn't have any affect at all. Changing the pattern color changes the background.
To change the background color now, you now have to edit the cell, select no pattern and then change the background color to what you want it to be. That also means that the toolbar icon "Change background color.." does not work until you removed the default pattern to none. Removing the pattern revert the white background to black once more.
Manipulate the background color also seems so have some odd effects of the grid, you can't get it back after you altered the background color.