Since low 'nice' values correspond to high priority, the slider labels are inverted so that 'higher' corresponds to a lower nice number. However, this was not done for the slider control, resulting in the arrow keys moving the slider in the direction opposite to that expected by the user. This patch fixes this by setting invertedControls to 'true' for the priority slider.

BUG: 408074

1. Open Ksysguard.
2. Go to the tab that lists processes.
3. Right click on a process and select 'Set Priority'.
4. Click on the slider that sets the CPU priority.
5. Press the left and right arrow keys on the keyboard and check if they move the slider in the appropriate direction.