[gtk] (10 commits) Non-fast-forward update to branch deprecate-all-the-cells

[Matthias Clasen <matthiasc src gnome org>]

The branch 'deprecate-all-the-cells' 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:

  a7738c1... paperdialog: Drop an unused function
  47e71ee... inspector: Drop an unused file
  aef869a... Deprecate treeviews and cell renderers
  c0cf6aa... tests: Ignore deprecations
  9452928... demos and examples: Ignore deprecations
  89def0d... testsuite: Ignore deprecations
  3702987... tools: Ignore deprecations

Commits added to the branch:

  ac87c72... paperdialog: Drop an unused function (*)
  08c0020... placesview: Stop using GtkEntryCompletion (*)
  68b73eb... Merge branch 'matthiasc/for-main' into 'main' (*)
  95169ee... flowbox: Stop using gtk_render_background (*)
  8ae8238... inspector: Drop an unused file
  3e227f5... Deprecate treeviews and cell renderers
  8288fbd... demos and examples: Ignore deprecations
  b0322c1... tools: Ignore deprecations
  9829361... testsuite: Ignore deprecations
  9398584... tests: Ignore deprecations

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