[geary: 20/20] Merge branch 'wip/794700-lazy-load-conversations' into 'master'

[Michael Gratton <mjog src gnome org>]

commit 3d51863788563d7db100cb19793dd5a973363a45
Merge: c56d86f4 23973b57
Author: Michael Gratton <mike vee net>
Date:   Mon Jan 21 02:10:14 2019 +0000

    Merge branch 'wip/794700-lazy-load-conversations' into 'master'
    
    Make conversation loading olive-buttery smooth
    
    Closes #184
    
    See merge request GNOME/geary!90

 po/POTFILES.in                                     |   2 +-
 src/client/application/geary-controller.vala       |  48 +-
 ...older.vala => components-placeholder-pane.vala} |   9 +-
 src/client/components/main-window.vala             |   9 +-
 .../conversation-viewer/conversation-email.vala    | 401 +++++++++------
 .../conversation-viewer/conversation-list-box.vala | 552 ++++++++++-----------
 .../conversation-viewer/conversation-message.vala  | 238 ++++++---
 .../conversation-viewer/conversation-viewer.vala   | 134 +++--
 src/client/meson.build                             |   2 +-
 src/client/util/util-gtk.vala                      |  14 +
 src/engine/app/app-conversation.vala               |   4 +-
 .../replay-ops/imap-engine-fetch-email.vala        |  27 +-
 ui/client-web-view.js                              |   5 +-
 ...aceholder.ui => components-placeholder-pane.ui} |   8 +-
 ui/conversation-message.ui                         |  11 +-
 ui/geary.css                                       |  20 +-
 ui/org.gnome.Geary.gresource.xml                   |   2 +-
 17 files changed, 864 insertions(+), 622 deletions(-)
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