Some subtypes never made it to all neccessary places when they were
introduced. This was throwing warnings when accessing such a properties
subtype from python.
The sub_type enums were also defined in 4 different places:
- RNA_types.h 'PropertySubType'
- rna_rna.c 'rna_enum_property_subtype_items'
- rna_rna.c 'subtype_items'
- bpy_props.c as multiple enums
This patch syncs the definitions across all places so that they are the
same everywhere. It also looks redundant to define these twice in
rna_rna.c, now just use 'rna_enum_property_subtype_items' there (and get
rid off 'subtype_items').
Also moved 'POWER' & 'TEMPERATURE' to number enum in bpy_props (these
were defined in the array enum).