[gtk] (16 commits) ...Merge branch 'ebassi/finish-template' into 'main'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  7857c1a... Add gtk_widget_clear_template() (*)
  71eb19b... mediacontrols: Use gtk_widget_clear_template() (*)
  e8c5c2f... emojichooser: Use gtk_widget_clear_template() (*)
  620d48c... docs: Clarify scope of gtk_widget_clear_template() (*)
  01f5142... Port constraint editor to gtk_widget_clear_template() (*)
  1bba874... Port icon browser to gtk_widget_clear_template() (*)
  bf75a21... Port node editor to gtk_widget_clear_template() (*)
  e71f9bb... Port gtk-demo widgets to gtk_widget_clear_template() (*)
  c2ec244... docs: Include clear_template() in the templates overview (*)
  103f52b... Port the inspector to gtk_widget_clear_template() (*)
  ad361ab... filechooserdialog: Use gtk_widget_clear_template() (*)
  0074ee3... filechooserwidget: Use gtk_widget_clear_template() (*)
  01e99fa... statusbar: Use gtk_widget_clear_template() (*)
  63fe334... fontchooserdialog: Use gtk_widget_clear_template() (*)
  f4f683a... Rename clear_template to dispose_template (*)
  685961a... Merge branch 'ebassi/finish-template' into 'main'

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