Merge remote-tracking branch 'remotes/kraxel/tags/ui-20210219-pull-request' into staging

ui: spice bugfixes.
ui: first batch of cocoa updates.

# gpg: Signature made Fri 19 Feb 2021 22:00:14 GMT
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ui-20210219-pull-request:
  ui/console: Remove dpy_gl_ctx_get_current
  ui/cocoa: Statically allocate dcl
  ui/cocoa: Interpret left button down as is when command is pressed
  spice-app: avoid crash when core spice module doesn't loaded
  ui/cocoa: Do not copy members of pixman image
  ui/cocoa: Support unique keys of JIS keyboards
  spice: flush drawing before notifying client
  spice: flush on GL update before notifying client

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>