Change the terrain alignment when a unit is dead

[sanderd17]

When units are dead, their alignments are kept as they were. So if a regular unit dies on a hill, it falls flat. But that could mean it falls directly in the hill, or it can float above the hill.

If should be better if dead units are pitch-roll aligned, and even for building rubble it would be better if it's aligned to the terrain.

See screenshot:

[elexis]

​Phab:D263

[Stan]

Backlogging due to lack of progress, lack of review, or users going MIA.