Merge remote-tracking branch 'remotes/kraxel/tags/ui-20191018-pull-request' into...

ui: bugfixes for cocoa, curses and input-barrier.

# gpg: Signature made Fri 18 Oct 2019 11:16:53 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <[email protected]>" [full]
# gpg:                 aka "Gerd Hoffmann <[email protected]>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <[email protected]>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ui-20191018-pull-request:
  ui: fix keymap file search in input-barrier object
  curses: correctly pass the color pair to setcchar()
  curses: use the bit mask constants provided by curses
  ui: Fix hanging up Cocoa display on macOS 10.15 (Catalina)

Signed-off-by: Peter Maydell <[email protected]>