* RNA's editor types enum (space_type_items) has been re-ordered, added icons, and removed internal-only SPACE_EMPTY value, so that it matches the menu.
* Two fixes in code drawing enums as dropdown menu:
** All items were taken into account when computing the number of needed columns, now simple separators (void string items) are ignored.
** Simple separators items were drawn as labels, taking far too much space!
And now translators will be free from that ugly, insane menu-string! :P
Thanks to Brecht for the review.