Bug 834653 - [EMAIL] Message list synchronization progress bar should become indeterminate/show "candybar" state after a timeout since last progress bar update.
Merge pull request #8049 from asutherland/email-progress-candybar-on-timeout

Bug 834653 - [EMAIL] Message list synchronization progress bar should become indeterminate/show "candybar" state after a timeout since last progress bar update. r=squib