[geary: 5/5] Merge branch 'mjog/fix-null-message-ids' into 'mainline'

[Michael Gratton <mjog src gnome org>]

commit a6773cebb8d9498ccbd85dc6e0e0a6fefc245749
Merge: 96b62318 47927aaf
Author: Michael Gratton <mike vee net>
Date:   Fri Nov 1 05:24:50 2019 +0000

    Merge branch 'mjog/fix-null-message-ids' into 'mainline'
    
    Fix issues with null message ids
    
    See merge request GNOME/geary!357

 src/client/composer/composer-widget.vala     | 15 +++++++++++++--
 src/engine/api/geary-email.vala              | 27 +++++++++++++++++----------
 src/engine/imap-db/imap-db-folder.vala       | 16 ++++++++++------
 src/engine/imap/api/imap-folder-session.vala | 23 +++++++++++++++++------
 4 files changed, 57 insertions(+), 24 deletions(-)
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