[epiphany] (6 commits) Non-fast-forward update to branch wip/exalm/gtk4

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/gtk4' 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:

  a5f39d3... Stop using gtk_container_get_children() for GtkListBox and 
  75c2c8f... search-engine-listbox: Don't subclass GtkListBox
  21e32f2... general-page: Stop using GtkFileChooserButton
  1072c30... download: Stop using GtkFileChooserButton
  1de21d2... Prefer GFile-based GtkFileChooser API
  15d7c4d... WIP: Port to GTK4

Commits added to the branch:

  79a3028... Stop using gtk_container_get_children() for GtkListBox and  (*)
  5028e1b... search-engine-listbox: Don't subclass GtkListBox (*)
  7328e5b... general-page: Stop using GtkFileChooserButton (*)
  9d8e1f1... download: Stop using GtkFileChooserButton (*)
  f14fd60... Prefer GFile-based GtkFileChooser API (*)
  7708f97... WIP: Port to GTK4

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