[gtk] (30 commits) Non-fast-forward update to branch focus-ring-experiment

[Matthias Clasen <matthiasc src gnome org>]

The branch 'focus-ring-experiment' 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:

  0d6b5c8... Focus ring experiments
  b2ac1e9... fine-tuning

Commits added to the branch:

  0ebcf8c... placesview: Fix up the address entry help popover (*)
  8e2ffb3... widget: Add missing callback annotation (*)
  30c386d... Merge branch 'missing-annotation' into 'master' (*)
  e026a04... Merge branch 'fix-placesview-popover' into 'master' (*)
  9fe6bc0... HC: fix switch slider borders (*)
  bca608c... Merge branch 'wip/jimmac/HC-slider-border' into 'master' (*)
  e75bc28... icon-theme: Fix deadlock in GktIconTheme dispose (*)
  9861173... Stop using the -gtk-icon-theme style property (*)
  7aeef71... css: Get the icon theme via the settings (*)
  2ddff87... css: Drop the -gtk-icon-theme property (*)
  c0d18eb... Fix annotations for GtkCustomLayout (*)
  fe6ef52... icontheme: Keep a serial (*)
  21fcef7... Merge branch 'ci-custom-layout' into 'master' (*)
  58ca3b0... css: Compare icon theme serials (*)
  723d57e... widget: Add a system_setting_changed vfunc (*)
  129b8bb... window: Use gtk_system_setting_change (*)
  4b13d99... settings: Call gtk_system_setting_changed (*)
  a59cb5d... icontheme: Call gtk_system_setting_changed (*)
  679863a... image: Invalidate icon helper when icon theme changes (*)
  7b4378b... widget: Update when font settings change (*)
  a199060... Drop gtk_style_context_reset_widgets (*)
  94906d0... Drop gtk_widget_reset_style (*)
  8b1e857... Merge branch 'fix-icontheme-invalidation' into 'master' (*)
  ba45d7a... menusectionbox: Improve circular button spacing (*)
  f4b1762... Adwaita: Add padding to circular button rows in menus (*)
  861bff4... Merge branch 'matthiasc/for-master' into 'master' (*)
  424a86a... Adwaita: lower glyph contrast for checkboxes (*)
  7fe51a8... Merge branch 'wip/jimmac/uniform-checkboxes' into 'master' (*)
  c6d04da... Drop some unnecessary includes
  6e1a310... window: Tweak visible focus behavior

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