* This is experimental, the file format may change still!
* Helps reduce memory usage, keeps .blend files smaller, and makes
saving quicker when not editing multires.
* This is implemented at the customdata level, currently only the
multires displacements can be stored externally.
ToDo
* Better integration with object duplication/removal/..
* Memory is not yet freed when exiting sculpt mode.
* Loading only lower levels is not supported yet.
Keymaps are now saveable and configurable from the user preferences, note
that editing one item in a keymap means the whole keymap is now defined by
the user and will not be updated by Blender, an option for syncing might be
added later. The outliner interface is still there, but I will probably
remove it.
There's actually 3 levels now:
* Default builtin key configuration.
* Key configuration loaded from .py file, for configs like Blender 2.4x
or other 3D applications.
* Keymaps edited by the user and saved in .B.blend. These can be saved
to .py files as well to make creating distributable configurations
easier.
Also, user preferences sections were reorganized a bit, now there is:
Interface, Editing, Input, Files and System.
Implementation notes:
* wmKeyConfig was added which represents a key configuration containing
keymaps.
* wmKeymapItem was renamed to wmKeyMapItem for consistency with wmKeyMap.
* Modal maps are not wrapped yet.
* User preferences DNA file reading did not support newdataadr() yet,
added this now for reading keymaps.
* Key configuration related settings are now RNA wrapped.
* is_property_set and is_property_hidden python methods were added.
* Screen keymap is now split up in two, some of the area/region
manipulation operators here need to be handled before others.
* Moved paint/sculpt/sketch out of the 3d view keymap, these were
there as a workaround, now with keymap poll no longer needed.
* Also fixes#19297, 3d cursor moves when combing in particle mode.
* Image painting back. 2d paint, 3d paint and projection, undo,
pressure, repeating paint operations, etc should all work.
Drawing cursor needs a bit of work, only gets shown when enabling
texture paint mode now.
* Move sculpt, image paint, and vertex/weight paint into a single
sculpt_paint module. Doesn't make much difference now, but nice
to have it together for better integration and consistency in
the future.
