Lifecycle cleanup

also address wakelock handling

added Mailbox Sponsor 6 Weight: 3 labels

assigned to @sebkur

changed due date to January 03, 2022

mentioned in issue #26 (closed)

mentioned in merge request !56 (merged)

mentioned in commit 5b150ad0

closed with merge request !56 (merged)

added Mailbox app label

added R: fixed label