Ignore empty emails
Merge remote-tracking branch 'chiiph/bug/dont_fail_on_empty_mail' into develop
Signal unread email
Signal string content instead of bool or int
Improve the unseen filter
Add changes file
Merge branch 'develop' of ssh://leap.se/leap_mail into develop
Merge remote-tracking branch 'chiiph/bug/various_fixes' into develop
add import for cannotlistenerror
Merge remote-tracking branch 'kali/bug/fix_cannotlisten_import' into develop
Add errors in logger so we get them in client.
Update to new soledad package scheme.
Safely get the indexes from soledad
Merge remote-tracking branch 'drebs/feature/3487-split-soledad-into-common-client-and-server' into develop

Conflicts:
	src/leap/mail/imap/fetch.py
	src/leap/mail/imap/server.py
Merge remote-tracking branch 'kali/feature/add_debug_errors' into develop
Make a sensible default for incoming mail fetch period.

Setting it to 5 min.
Merge remote-tracking branch 'kali/feature/3409_make_imap_fetch_period_configurable' into develop
refactor imap fetch
Merge remote-tracking branch 'chiiph/bug/safe_soledad_list_indexes' into develop
improve packaging