draw condition relies on entity.getKeyValue, which also provides default values; thus removed default "0" for all group entities in .def loader
mind to add entity.getOnlySpecifiedKeyValue func or perform by visitor?
misc...
* restrict unwanted angle(s) keys commits on moving generic, eclassmodel, miscmodel entities
* reverted angle(s), origin, scale entity keys save format from %f to %g
* fix uniform rotation operations for generic entities with angles key
* use more precise meth for rotating point entities with only angle rotated
* snap tiny inaccuracies in angle(s) and origin point entities keys
* workaround: don't discard empty group ents, having origin key
* entity class convertion: prevent converting worldspawn; prevent converting point entity to empty group
menus...
* view->show->Entity boxes (always show bbox for ents with model)
misc...
FBO support
* preferences->display->entities->Names Display Ratio (2D): hide names, if view_size/bbox_size > value; def = 64
