* resultify update_recent_quota()
* add a device-message if quota exceeds QUOTA_WARN_THRESHOLD_PERCENTAGE
* check if a quota warning should be added during housekeeping, this is at least once a day
* dc_get_config("quota_exceeding") is useful for bots
* make clippy happy
* reword QuotaExceedingMsgBody message
* avoid lots of warnings if quota jitters around the warning threshold
* allow clippy::assertions_on_constants
these constants depend on each other, it makes sense to check that they are not changed in an incompatible way
* add imap::get_quota_roots()
* schedule quote-checking job on getting connectivity-html
* get quota and debug print it
* basic quota output
* update quota at most once per minute, emit event on changes
* use more meaningful names
* add some comments, move update_recent_quota() to quota.rs
* show root name only if there are several roots
* make clippy happy, some refactorings
* allow only one update-quota job per time
* add now supported QUOTA to standards.md