[balsa] (69 commits) Non-fast-forward update to branch 64-save-empty-attachment

[Peter Bloomfield <peterb src gnome org>]

The branch '64-save-empty-attachment' 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:

  d5b1c40... body: implement libbalsa_message_body_check_if_empty()

Commits added to the branch:

  73180b8... desktop notifications enhancements and clean-up (*)
  1dd2801... per-user and server IMAP server-side thread message hiding (*)
  2952fe5... fix copy/paste of URL's from text message parts (*)
  b4904a4... balsa-mime-widget-callbacks: Handle error better (*)
  eb1a370... Update Slovenian translation (*)
  53f08e3... Update Catalan translation (*)
  2b7aedf... improve HTML context menus (*)
  1725d54... translate “unknown error” (*)
  63f626b... add ability to open download location after download (*)
  f071de6... fix memory leak (*)
  0e5ea49... add option to open folder when saving multiple attachments (*)
  c522093... balsa-mime-widget-callbacks: Use GtkFileChooser (*)
  ddb5ee0... remove unnecessary checks, exported methods (*)
  fcbf27f... remove more unnecessary checks for != NULL (*)
  bf3821f... Merge branch '67-gtkfilechooser-supports-overwrite-confirm' (*)
  1bee637... improve text of context menu labels (*)
  f4b6aa9... Merge branch 'information_#63' into 'master' (*)
  66d3cce... Update Ukrainian translation (*)
  11917e8... minor coding style improvements (*)
  c20303a... Merge branch 'master' of gitlab.gnome.org:GNOME/balsa (*)
  b1c625f... Update Swedish translation (*)
  a2512c0... Update Brazilian Portuguese translation (*)
  893da7b... Update POTFILES.in (*)
  757297e... Update Polish translation (*)
  eb64dde... Update Swedish translation (*)
  d8153d7... Update Ukrainian translation (*)
  c6cfa76... Update Brazilian Portuguese translation (*)
  14a8ad1... Updated Spanish translation (*)
  787a732... Update Chinese (China) translation (*)
  db213c6... send: Add an out parameter (*)
  e150b2a... send: Fix typo? (*)
  e298662... send: Remove an unused parameter (*)
  4143313... message: Drop unused parameter (*)
  089a77a... send: Drop unused parameter (*)
  d1145bc... Merge branch 'send-issues' into 'master' (*)
  892bc44... Merge branch '66-save-and-open-folder' into 'master' (*)
  98ce0d2... Update Swedish translation (*)
  36c3f36... Update Ukrainian translation (*)
  05cc59e... Update Brazilian Portuguese translation (*)
  2aa3ead... Update Polish translation (*)
  1688335... address-book-rubrica: Do not leak strings (*)
  3c6031f... files: Do not leak content_type (*)
  1a109dc... send: Do not leak syslog_msg (*)
  85ce0e3... Merge branch 'master' of gitlab.gnome.org:GNOME/balsa (*)
  77ded46... message: GMimeContentType is a GObject subclass (*)
  9949263... Update Danish translation (*)
  52436fb... Update Swedish translation (*)
  61051ef... mailbox_imap: Avoid a sign-compare warning (*)
  9ab5b66... imap-handle: Do not underflow buffer (*)
  612a98c... Update Spanish translation (*)
  1cf95cc... Update Serbian translation (*)
  e1e7d93... Update Hungarian translation (*)
  a36ce84... Update Norwegian Bokmål translation (*)
  8831660... fix misleading print options section heading (*)
  f97d999... Update Ukrainian translation (*)
  cb6ccfe... Update Swedish translation (*)
  a442f61... Update Polish translation (*)
  32ef702... fix deadlock initialising the common HTML web view context (*)
  cfd9ea7... Merge branch '72-fix-web-context-init-deadlock' into 'maste (*)
  c556ebf... message-window: Wait for "changed" signal (*)
  160df91... Merge branch '72-message-window' into 'master' (*)
  6c12ec4... refactoring of crypto flags (*)
  c8f61a6... Merge branch '70-refactor-crypto-flags' into 'master' (*)
  04bc777... Update Danish translation (*)
  669aac6... Include fcntl.h for open()/fcntl() (*)
  5b78b7b... Merge branch 'include-fcntl.h' into 'master' (*)
  7206936... mime: Remove unused libbalsa_wrap_view() (*)
  5e85e28... Update Brazilian Portuguese translation (*)
  254b385... body: implement libbalsa_message_body_check_if_empty()

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