Make sure that the recalculate button does not show up when task is running.
Make sure that the recalculate button does not show up when task is running.

Also some minor style changes.

Patch by: Madhusudan C.S. and Lennard de Rijk

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging