refine bitfield groups (some bitfield issues left todo)
* add group fix by additional constraint
* refine command verification for groups
* refine resolving enum groups
* add patches for unused bitfield parameters in commands
* add NotUsedMask as bitfield
* replaced GenericMask with GLbitfield
* resolve all gl.xml issues
* refine verification and resolve warning outputs
* refine logs
* start replacing some tabs with spaces
* unleash strings by bitfield