Cleanup Amphs' unitdefs:

- fix Polish helptexts (remove diacritics) and improve them
- remove SATELLITE from chase/target cats
- align whitespace
- remove useless UnitDef tags: mass (set by unitdefs_post), maxSlope and maxWaterDepth (set in moveDefs), bmcode, moveState (set by Initial States), side, TEDclass
- ditto for wrecks: height, hitDensity, seqNameReclamate, world, category, featureReclamate
- fix wreckage footprint sizes