[gtk] (14 commits) Non-fast-forward update to branch fix-icontheme-invalidation

[Matthias Clasen <matthiasc src gnome org>]

The branch 'fix-icontheme-invalidation' 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:

  ae4c6c6... Stop using the -gtk-icon-them style property
  61e538f... css: Drop the -gtk-icon-theme property
  f87a9c2... widget: Add a system_setting_changed vfunc
  29c816e... window: Use gtk_system_setting_change
  675986c... settings: Call gtk_system_setting_changed
  703e8e2... icontheme: Call gtk_system_setting_changed
  8bbd5a9... image: Invalidate icon helper when icon theme changes
  f83d5e7... spinner: Update when gtk-enable-animation changes
  66fb146... widget: Update when font settings change
  f142845... Drop gtk_style_context_reset_widgets

Commits added to the branch:

  55dd737... textview: fix assertion when toggling caret visibility (*)
  0ff67fa... Merge branch 'wip/chergert/fix-toggle-caret-visibility' int (*)
  0d6b5c8... Focus ring experiments (*)
  5200ae7... Stop using the -gtk-icon-them style property
  39c25c9... css: keep a ref on the icon theme
  82d6ac3... css: Drop the -gtk-icon-theme property
  57dc57a... widget: Add a system_setting_changed vfunc
  69cfc93... window: Use gtk_system_setting_change
  922827f... settings: Call gtk_system_setting_changed
  0daedb7... icontheme: Call gtk_system_setting_changed
  ef1beb6... image: Invalidate icon helper when icon theme changes
  d9e484d... spinner: Update when gtk-enable-animation changes
  0110209... widget: Update when font settings change
  a86a08e... Drop gtk_style_context_reset_widgets

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