The Doodad Properties window brings many features that used to be
available only in the `doodad` CLI tool into the Doodad Editor.
* In the Doodad Editor there is a new menubar item: "Doodad" which
corresponds to the "Level" menu when you're editing a level.
* The "Doodad" menu has two items:
- "Doodad Properties" (NEW)
- "Layers" (moved here from the Tools menu)
* The Doodad Properties window lets you edit the Title and Author values
of the doodad, as well as modify its Tags and manage its Script.
* Its script can be attached (browse for .js file on disk), its existing
script saved back to disk (dev shell prompt) or deleted altogether
from the doodad.
* You can create, modify, and delete Tags on the doodad.
Other changes:
* In the Level Editor, the "Level->Page Settings" menu is renamed to
"Level->Level Properties" to match with "Doodad->Doodad Properties"
and the pop-up window is retitled accordingly.
* The Exit Flag only exits if the Player touches it - not just any
mobile doodad!