Logic editing back!
Test screenie:
http://download.blender.org/institute/rt9.jpg
I gave the buttons a bit more width, added nicer linkline draw.
Not working yet:
- theme colors for sensor/actuator types (was old button colors)
- moving sensors up/down (used bad pupmenu... better is icons like
used for modifiers)
- Linkline mouse-over select. Currently deleting a link goes by
drawing the same line again.
Needs to be fully tested for functionality too, leave that to the GE
department. :)
I noted there's bad button hacking with reading button values,
like check_state_mask(). uiBut structure was not meant to be exported
outside of interface module.
Added SpaceLogic, to restore the old logic buttons into.
In future it can be used for a more advanced logic editor, with
states, behaviour, whatever. We'll see!
This commit only adds the backend for new space. Committed this
now as reference for when we need another space type. It's still
not well plugin-able (dynamic space types), but my idea is to just
have a new SpacePlugIn for this, with a neat small API to define
all relevant callbacks.
Also note the icon for the spacetype is wrong still.
