Merge remote-tracking branch 'remotes/kraxel/tags/pull-ui-20170131-2' into staging

ui: bugfixes and small improvements all over the place.

# gpg: Signature made Tue 31 Jan 2017 15:48:20 GMT
# gpg:                using RSA key 0x4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/pull-ui-20170131-2:
  console: fix console resize
  gtk: Hardcode LC_CTYPE as C.utf-8
  vnc: fix overflow in vnc_update_stats
  spice: wakeup QXL worker to pick up mouse changes
  ui/gtk.c: add ctrl-alt-= support for zoom in acceleration
  ui: fix format specfier in vnc to avoid break in build.
  ui/gtk: Fix mouse wheel on 3.4.0 or later
  vnc: track LED state separately
  ui: add support for mice with extra/side buttons
  ps2: add support for mice with extra/side buttons
  qapi: add support for mice with extra/side buttons

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