Mobility numbers

Minor tuning of Mobility numbers, notably less stamina cost on TR.  razakai has approved these in chat.

See merge request !424

SteadyShot

Fixed a bug where Shoot didn't inherit Aim's mark bonus. Also Steady Shot now fnctions like Double Jab, costing 0 and automatically replacing basic Shoot if it's on cooldown.

See merge request !422

Reduce stamina cost on Trained Reflexes

Fixed a bug where Shoot didn't inherit Aim's mark bonus. Also Steady Shot now functions like Double Jab, costing 0 and automatically replacing basic Shoot if it's on cooldown.

Fixed Derth staying fark after completing Storming the city quest

Hymn Nocturnalist correctly has a cooldown, has cost reduced and correctly updates the currently sustained hymn if needed

Misc Oozemancer Tooltips

Acidic skin's tooltip properly shows its disarming nature

Acidfire's tooltip properly expresses that it can blind and the chance

See merge request !421

typo fix

Closes #1

See merge request !419