[geary/wip/ricotz/vala] (11 commits) ...Accept string.index_of_nth_char() to return long or int for new valac

[Rico Tzschichholz <ricotz src gnome org>]

Summary of changes:

  c1ed9b1... Flatpak: Add enchant as a module (*)
  2166405... Update Turkish translation (*)
  45a6308... Merge branch 'alatiera/flatpak-enchant' into 'master' (*)
  b917b1b... Merge branch 'wip/ricotz/vala' into 'master' (*)
  c2a7192... Downgrade sidebar warning message to debug to ease debuggin (*)
  664950b... Cleanup attachment save handling (*)
  0f09659... Merge branch 'wip/cleanup-attachment-save-handling' into 'm (*)
  9ccf513... Updated Danish translation (*)
  5b77b1c... Updated Slovenian translation (*)
  a2b2d20... Update Polish translation (*)
  6272e93... Accept string.index_of_nth_char() to return long or int for

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