Tweaks the difficulty of some construction tasks.

Fixes https://github.com/CleverRaven/Cataclysm-DDA/issues/8606.
Cartwheels for vehicles
Traslation template update
Merge branch 'construction-tweaks' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into json
Merge branch 'update-pot' of https://github.com/VlasovVitaly/Cataclysm-DDA into json
Merge branch 'cartwheel2' of https://github.com/Zorbeltuss/Cataclysm-DDA into json