branch scratch/ns/refactor created (now 0132e0a)

[Alan Third]

athird pushed a change to branch scratch/ns/refactor.

        at  0132e0a   Fix image crash on macOS (bug#49688)

This branch includes the following new commits:

       new  db055f9   Simplify macOS drawing code
       new  d9fd86c2  Tidy up NS port OS window handling
       new  df9a612   Change NS port resize detection
       new  8d0fb51   Fix macOS live resize drawing
       new  6f4f66d   Move NS port toolbar handling to the window
       new  94b4470   Move parent frame setting code into EmacsWindow
       new  7b255dc   Fix some macOS problems
       new  dee3be7   * src/nsterm.m (ns_set_frame_alpha): Enable alpha on 
GNUstep.
       new  93b18cc   Simplify NS sizing and positioning code
       new  8d34954   Fix NS inset rectangle corners
       new  361d043   Convert fringe bitmaps to vectors on NS port
       new  0132e0a   Fix image crash on macOS (bug#49688)