- Edit mode Mesh undo/redo back
(undo for editmodes needed recode, todo for curve/lattice/etc)
- Added border select for edit mesh
- Added Akey (de)select all for edit mesh
- Added notifiers for mode changes.
This is also the first trial to dynamically add/remove
keymap handlers, based on modes. For that reason the Object
keymap was split in 2, modal and non-modal. On TABkey, the
view3d listener removes and adds maps.
The view3d keymap still handles generic mouse/border selection.
Internally it will verify modes.
The modes are not re-implemented still... have to move this
to scene context.
