[geary: 7/7] Merge branch 'mjog/598-sent-email-sound' into 'mainline'

[Michael Gratton <mjog src gnome org>]

commit 2f3f2ca8d1c6de612fa4c91606adbe7361349846
Merge: 3202a9c0 a47e0fce
Author: Michael Gratton <mike vee net>
Date:   Sat Mar 21 06:38:26 2020 +0000

    Merge branch 'mjog/598-sent-email-sound' into 'mainline'
    
    Sent email sound plugin
    
    Closes #598
    
    See merge request GNOME/geary!450

 .gitlab-ci.yml                                     |  10 +-
 INSTALL                                            |  16 +-
 meson.build                                        |   1 +
 po/POTFILES.in                                     |   1 +
 src/client/application/application-controller.vala |   7 +-
 .../application-email-store-factory.vala           | 215 +++++++++++++++++++++
 .../application-notification-context.vala          | 174 ++---------------
 .../application/application-plugin-manager.vala    |   6 +-
 src/client/meson.build                             |   1 +
 src/client/plugin/meson.build                      |   1 +
 src/client/plugin/plugin-folder-extension.vala     |   8 +-
 .../plugin/plugin-notification-extension.vala      |   4 +-
 src/client/plugin/sent-sound/meson.build           |  29 +++
 src/client/plugin/sent-sound/sent-sound.plugin.in  |   4 +
 src/client/plugin/sent-sound/sent-sound.vala       |  55 ++++++
 src/engine/smtp/smtp-client-service.vala           |   5 +-
 16 files changed, 354 insertions(+), 183 deletions(-)
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