Patterpad 0.13.0

Added

• Setting a flag is its own step. Point an effect at a flags property and the value step now leads
  with Set a flag / Clear a flag, listing the flags you declared, instead of asking you to
  build the call yourself. Replacing the whole set is still there, one step further in.
• File ▸ Close Project. Opening a project was a one-way door: the welcome screen only appeared at
  launch, so there was no way back to it, or to the shipped tour, without quitting. Closing returns
  the window to the welcome with the project you closed at the top of the recents list, and shuts the
  Play, Search and Coverage windows, which have nothing to show once there is no project. A quit
  after closing opens on the welcome screen rather than silently reopening what you just closed.
• The Properties page carries a version-control badge, the way a scene row does: modified, new,
  locked by someone else, out of date. It reads the project file, which is where @patter
  declarations live, and it updates the moment the page saves rather than on the next poll.

Changed

• Newly written effect targets spell the scope out (@patter.gold where the editor used to write
  @gold). Both forms mean the same thing and both compile; old scenes are untouched, and a target
  re-picked in the editor takes the longer spelling. (expr-editor 0.15.0.)

Fixed

• A pinned tool window stays where you put it. On macOS, dragging the editor dragged every pinned
  window along with it. They keep the pin's meaning - above Patterpad while you are in Patterpad, and
  not above your other apps - without being towed around. (app-shell 0.35.1.)