[easytag] (42 commits) Non-fast-forward update to branch wip/future-gtk

[David King <davidk src gnome org>]

The branch 'wip/future-gtk' 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:

  a4b54c6... Handle UI scale factor in images tree view
  574e6f5... Use resource property on GtkImage
  c4c1121... Use g_memory_output_stream_steal_as_bytes()
  f112500... Use gdk_pixbuf_loader_write_bytes()
  4cb5b12... Use G_DEFINE_TYPE_WITH_PRIVATE
  61a77c9... Use gtk_accel_label_set_accel()

Commits added to the branch:

  31b6782... Added German help translation (*)
  c47e1c6... Updated Spanish translation (*)
  7c04a86... Add missing break in switch (*)
  2703196... Remove unnecessary NULL check in CDDB dialog (*)
  65435b7... Fix compilation of misc test (*)
  91e48e8... Handle OptimFrog files as if they are unknown (*)
  2db55ba... Remove redundant declaration (*)
  0a6d022... Add missing default cases in switch statements (*)
  6f19b85... Avoid shadowed variable warnings (*)
  e90a7e8... Avoid unhandled switch cases warning (*)
  9110197... Avoid old-style function declaration (*)
  e0a9c2f... Fix sign comparison warnings (*)
  127157d... Fix const correctness warnings (*)
  3aaf603... Port to AX_COMPILER_FLAGS (*)
  7f2d67b... Use AX_IS_RELEASE to control compiler warnings (*)
  8097699... Use AX_GENERATE_CHANGELOG (*)
  4d2e91f... Refactor function to check if all files are saved (*)
  e9225a1... Refactor file list freeing functions (*)
  f6f2e4d... Refactor artist album file list functions (*)
  e319c90... Remove unused displayed list function (*)
  8a94b7d... Refactor several file list functions (*)
  44ee9ec... Remove several unused functions (*)
  ecf346d... Fix redefinition warning in Windows compat code (*)
  a2d8e7a... Fix redefinition warning from TagLib (*)
  bec4bdd... Update NEWS for 2.3.4 release (*)
  54ba8cf... Add checks for extra id3lib declarations (*)
  5b8659a... Return a value from et_artist_album_list_add_file (*)
  5df5c61... Add missing break in playlist dialog switch (*)
  69f6bb5... Fix format warnings caused by incorrect sign (*)
  1a775b1... Updated Polish translation (*)
  70e049b... Updated Czech translation (*)
  6879d49... Updated Turkish translation (*)
  e3f197a... Fix CDDB requests being truncated (*)
  dd7ee20... Handle empty descriptions in ID3 tag artwork (*)
  7c2d646... Fix memory leak in artwork types dialog (*)
  8f4cd65... Correctly update the artwork description (*)
  8d65b70... Handle UI scale factor in images tree view
  678d15b... Use resource property on GtkImage
  e877c43... Use g_memory_output_stream_steal_as_bytes()
  8701273... Use gdk_pixbuf_loader_write_bytes()
  d6bdbda... Use G_DEFINE_TYPE_WITH_PRIVATE
  37efc4c... Use gtk_accel_label_set_accel()

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