Show badges in the poster expansion card.
Fix badge serialization issue.
Poll style improvements.
Add close/open poll buttons to poll UI.
Disable the close poll functionality if allow_user_locale is enabled.
Don't allow voting on archived topics.
Extract scheduler cross-process locking into DistributedMutex.
Use DistributedMutex to make sure poll votes are tallied correctly.
improve keyboard shortcut css styles
minor keyboard shortcut copyedit
Merge pull request #2257 from vikhyat/distributed-mutex

Extract cross-process locking from the scheduler into DistributedMutex
Tighten API, add spec for recovery, keep mutex semantics
Merge pull request #2262 from vikhyat/poll-plugin

Add open/close buttons to poll UI
Merge pull request #2212 from vikhyat/badge-system

Show badges in the poster expansion card
FEATURE: Hidden site setting for max username length
add Docker support note
improve the lede
Tweak live reload due to CSS bundling in dev
Tweak badge granter not to try to double grant
Tweak badge styling