[easytag] (20 commits) Non-fast-forward update to branch wip/application-window

[David King <davidk src gnome org>]

The branch 'wip/application-window' 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:

  f792cfe... Move main window to EtApplicationWindow object
  7a23881... Pass the main window to actions as user data
  894b93c... Move log area to EtLogArea object
  2092b70... Move playlist window to EtPlaylistDialog object
  1aea933... Move load filenames dialog to EtLoadFilesDialog
  566852f... Move file search dialog to EtSearchDialog object
  20c5ce2... Move preferences dialog to EtPreferencesDialog
  a2bf0fb... Move CDDB dialog to EtCDDBDialog object
  a4d60ed... Move scan dialog to EtScanDialog object
  886b6d7... Replace strncat() with g_string_append()
  c09af3e... Move select and unselect actions to main window
  b397a3d... Move file selection actions to EtApplicationWindow
  c3362a6... Set a rough initial window size and pane positions
  8dd4010... Move browser to EtBrowser object

Commits added to the branch:

  043fc69... Add HELP_LINGUAS to the help Makefile (*)
  4a22b73... Fix conversion specifier in debug string (*)
  b596895... Remove a problematic debug string (*)
  c234480... Add Opus and Speex MIME types to desktop file (*)
  ea53ac5... Revert "Refactor Scan_Convert_P20_Into_Space()" (*)
  c37800b... Move main window to EtApplicationWindow object
  6abb0c4... Pass the main window to actions as user data
  52f3b90... Move log area to EtLogArea object
  4106e48... Move playlist window to EtPlaylistDialog object
  c1262b3... Move load filenames dialog to EtLoadFilesDialog
  154f482... Move file search dialog to EtSearchDialog object
  2e32188... Move preferences dialog to EtPreferencesDialog
  9243ef1... Move CDDB dialog to EtCDDBDialog object
  66ec404... Move scan dialog to EtScanDialog object
  9d2b650... Replace strncat() with g_string_append()
  b4d3398... Move select and unselect actions to main window
  fc8f4fc... Move file selection actions to EtApplicationWindow
  9a95074... Set a rough initial window size and pane positions
  6dc8b7f... Move browser to EtBrowser object
  bde83b1... Avoid a GtkApplication assertion

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