Blender Git Loki

Remove OPTYPE_REGISTER flag from click handler operator for anim editors

1) It made no sense to show this as the last operator which was used, since
these can only be used from the anim editors (and not the 3D View where this
panel appears most of the time)
2) Mouse select operators in other places didn't do this
3) There aren't really any editable parameters for this operator anyway
4) It's highly dependent on valid mouse coordinates as input.

Apart from that, undo still works fine, so no need to really keep this here.