[gedit] (8 commits) ...spell: get rid of ViewData

[Sébastien Wilmet <swilmet src gnome org>]

Summary of changes:

  3f95589... spell: refactor set_inline_checker_from_metadata() (*)
  7d89d2d... spell: do not depend on ViewData for document_loaded/saved (*)
  b44a339... spell: simplify and fix update_ui() (*)
  91a49ab... spell: make the menu item sensitive even for an empty buffe (*)
  da5a856... spell: avoid indentation level in update_ui() and fix comme (*)
  a99cfe1... spell: rename spell_cb() -> check_spell_cb() (*)
  7642944... spell: rename variable wg -> window_group (*)
  6148556... spell: get rid of ViewData

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