[gtk+] (12 commits) ...combobox: fix cell area allocation in menu mode for RTL

[Cosimo Cecchi <cosimoc src gnome org>]

Summary of changes:

  4675ed2... combobox: remove handling of focus-padding and focus-line-w (*)
  93523e7... combobox: allocate the CSS borders to GtkComboBox (*)
  821365a... combobox: move the allocation of the button contents box di (*)
  1bbd2c4... combobox: simplify size request code by using the button co (*)
  c598a95... combobox: cleanup GTK_COMBO_BOX_SIZE_ALLOCATE_BUTTON (*)
  00325e9... combobox: make sure to respect the GtkComboBox padding in m (*)
  a8211b7... combobox: cleanup and comment the allocation code somewhat (*)
  ec6b36a... combobox: cleanup allocation of children in list mode (*)
  cf7f0cb... combobox: always trim the allocated area by padding and bor (*)
  65e6248... combobox: use gtk_container_class_handle_border_width() (*)
  aa16f46... combobox: fix dropdown menu alignment for RTL languages (*)
  26ff536... combobox: fix cell area allocation in menu mode for RTL (*)

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