[gtk] (24 commits) ...Merge branch 'abolish-destroy' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  e0f9584... actionbar: Use dispose instead of destroy (*)
  37e381e... combobox: Use dispose instead of destroy (*)
  1b44a64... expander: Use dispose instead of destroy (*)
  03f145e... filechooserbutton: Use dispose instead of destroy (*)
  4c7cafd... label: Use dispose instead of destroy (*)
  8683925... modelbutton: Use dispose instead of destroy (*)
  7639d3d... text: Use dispose instead of destroy (*)
  9f4cea1... viewport: Use dispose instead of destroy (*)
  c8066bc... spinbutton: Use dispose instead of destroy (*)
  c60ffee... range: Use dispose instead of destroy (*)
  8baefaf... radiobutton: Use dispose instead of destroy (*)
  49fcf41... shortcutssection: Use dispose instead of destroy (*)
  d2cbc45... iconview: Use dispose instead of destroy (*)
  d46252c... notebook: Use dispose instead of destroy (*)
  327da3d... statusbar: Use dispose instead of destroy (*)
  3d4bb76... textview: Use dispose instead of destroy (*)
  401f8a7... treeview: Use dispose instead of destroy (*)
  77d15b1... window: Use dispose instead of destroy (*)
  82f4b16... printunixdialog: Use dispose instead of destroy (*)
  d03b152... placesview: Use dispose instead of destroy (*)
  1086acc... container: Use dispose instead of destroy (*)
  84944f1... gtk-demo: Use dispose instead of destroy (*)
  a4cfbec... widget: Drop the destroy vfunc (*)
  824c730... Merge branch 'abolish-destroy' into 'master'

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