Worktab overhaul

[MisterSpock]

1) The Tasks "Growing" and "Plantcut" are using the same skill. But the Brightness of the "Plantcut"Square doesnt give you this feedback (its always indicating a wrong level 3 skill). Also they should be closer to each other, to make clear that they both using the growing-skill. Also charakters with have enabled "Growing" by default should have enabled "Plantcut", if possible.

2) Unfortunally the deletion of the "Repair"Task doesnt make it easier. Because repairing is prior, the builder repair stuff, before rebuilding the important defence structure after a raid. I suggest to bring the prealpha 16 version back.