BF-admins agree to remove header information that isn't useful,
to reduce noise.
- BEGIN/END license blocks
Developers should add non license comments as separate comment blocks.
No need for separator text.
- Contributors
This is often invalid, outdated or misleading
especially when splitting files.
It's more useful to git-blame to find out who has developed the code.
See P901 for script to perform these edits.
- Key-map items properties now override tool-options
so modifier keys can have different behavior to the default action.
- Box & circle select now have `wait_for_input` properties
instead of detecting this based on selection options being set or not.
This relied on the key-map setting properties which may need to be
initialize from the tool settings.
Add tool options to control how select operates (add/sub/set/and/xor).
Note: edit mode armature select still needs to support all options,
this is complicated by how it handles partial end-point selection.
