Steal objective tweaks

- Adds atmos tech to the protected jobs list for thr RPD steal
objective.
- Adds RD and scientist for the slime extract.
- Adds HoS and warden for the ablative armor.
- Removes magboots from the steal objective entirely, they're too easy
to get now.
Adds advanced magboots

- Added advanced magboots (white, slows down less than magboots) and the
sprites for it.
- Added one pair to the elite suit storage unit, which is the CE's one.
- Made the magboots steal objective point to the advanced magboots
instead
- Updated changelog
Merge pull request #985 from Duny-/Duns_steal

Steal objective tweaks