- editing properties from python wasnt running their update function.
- missing commas made dir(context) give joined strings.
- added __undo__ as an operator class attribute so python ops can be set as undoable. (like existing __register__)
Create new orientation is now Ctrl-Alt-Space (Alt-Space is select orientation and the old ctrl-shift-c is taken by add constraints).
New orientation panel in 3d view sidebar (nkey) has operator buttons for select, create and delete. Eventually, this should become a list.
Note that orientation operators are missing notifiers to properly redraw the 3d view and its header properly.
