[gtk] (15 commits) Non-fast-forward update to branch wip/matthiasc/popup5

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/popup5' 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:

  47520f6... popover: Rename modal to autohide
  1a40ffc... builder tool: Handle modal->autohide rename
  5d3f6f1... Add a test for the property renaming
  b9eb4af... Mention modal->autohide rename in migration guide
  880166e... Stop using gtk_widget_get_surface
  ee736eb... Drop gtk_widget_get_surface
  903af66... Mention gtk_widget_get_surface in the migration guide
  d53a02f... Stop using gtk_widget_is_toplevel
  172f763... Drop gtk_widget_is_toplevel
  e0fbdce... Mention gtk_widget_is_toplevel in the migration guide
  bea83d8... Cosmetics
  20bce28... Stop using gtk_widget_get_toplevel
  f3a2c18... Drop gtk_widget_get_toplevel
  fd2bb8b... Mention gtk_widget_get_toplevel in the migration guide.
  efcab8e... Cosmetics

Commits added to the branch:

  6cb77ca... popover: Rename modal to autohide
  f4d23f6... builder tool: Handle modal->autohide rename
  2bfe6f3... Add a test for the property renaming
  2621a72... Mention modal->autohide rename in migration guide
  0d6c205... Stop using gtk_widget_get_surface
  e5d1628... Drop gtk_widget_get_surface
  25882b5... Mention gtk_widget_get_surface in the migration guide
  e0c713b... Stop using gtk_widget_is_toplevel
  e55e789... Drop gtk_widget_is_toplevel
  3302dd8... Mention gtk_widget_is_toplevel in the migration guide
  e5fee22... Cosmetics
  cf11fca... Stop using gtk_widget_get_toplevel
  6faf7aa... Drop gtk_widget_get_toplevel
  7c5b252... Mention gtk_widget_get_toplevel in the migration guide.
  415b695... Cosmetics