Added possibility to set the start hour of the timeline.
Added config parameter to set the start hour of the timeline
Added spinner to the timer settings panel to set the start hour of the
timeline
Made the conflict finder aware of the new timeline start hour setting.
Before it might have opened the wrong day, when a conflict has been
detected.
Fixed getRowCount()
Added the name of the day to the left and right of the midnight line.
Paint the midnight line with a width of 2.