check requireslevelup during evolution validity check, not during tree
generation as movepool fetch treats the 'level' as the max possible
level it was at (not the level it was encountered).
fix dropping pkm from external source causing exception (final return
false caused it to proceed with regular dragdrop operation from source
slot).
#1163
insert to front of list if the species matches
eevee gift in gen7 has all species at 50 including eevee; not sure if
this strategy is needed for the other formats but just in case.
Evolution info was not checked for non-eggs; for mystery gifts check
that the level of the evolution is not less than the level of the
matched encounter
fix spacing (cosmetic)
add temp flagging for magnetpull/static slots (will eventually refactor
into something functional that considers a set of slots including
swarm/etc)
