[gtk] (7 commits) Non-fast-forward update to branch fix-gen-demo-conf

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'fix-gen-demo-conf' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  9a64a30... build: Check CI envvars before rev-parse
  c6a3bea... gtkwindow: Simplify GTK grab notification
  6249b64... gtkwindow: Rename function
  1e18aad... gtkwindow: Fix "shadowed" checks for GTK grabs
  5446989... gen-demo-header.py: Fix running without git

Commits added to the branch:

  c1fbf65... build: Check CI envvars before rev-parse (*)
  8670034... Merge branch 'ebassi/rev-parse-fallback' into 'master' (*)
  f003a4c... gtkwindow: Simplify GTK grab notification (*)
  0a5d21c... gtkwindow: Rename function (*)
  6b7b232... gtkwindow: Fix "shadowed" checks for GTK grabs (*)
  ab6e4bf... Merge branch 'wip/carlosg/reset-after-grab' into 'master' (*)
  c18a1ac... gen-demo-header.py: Fix running without git

(*) This commit already existed in another branch; no separate mail sent