branch scratch/ns/refactor created (now 2ee451b)

[Alan Third]

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

        at  2ee451b   Fix NS inset rectangle corners

This branch includes the following new commits:

       new  a159bd0   Simplify macOS drawing code
       new  c319def   Tidy up NS port OS window handling
       new  40d30ea   Change NS port resize detection
       new  91b1715   Fix macOS live resize drawing
       new  4c10229   Move NS port toolbar handling to the window
       new  ae88acc   Move parent frame setting code into EmacsWindow
       new  d58e217   Fix some macOS problems
       new  2fcd93d   * src/nsterm.m (ns_set_frame_alpha): Enable alpha on 
GNUstep.
       new  87aae7e   Simplify NS sizing and positioning code
       new  2ee451b   Fix NS inset rectangle corners