Center board vertically if required.
The board is centered horizontally already in case the board is tall. If it is wide however, it still is aligned to the top leaving empty space just at the bottom. This patch vertically centers a wide board. Remove a work-around for Qt 4.6; Qt 4.8 is required and there is no visible difference without that work-around. The element "screen" had a transparent bar at the upper edge and adjustments were done in the code to hide it. As the element has been fixed, the adjustments can be removed. REVIEW: 114851 GUI:
Showing with 24 additions and 16 deletions