Implement mechanism for broadcast of messages to all tabs in every window
Allow currently active bin to be set and received by content scripts
Allow setting of the active bin in certain circumstances

1) Manually.
2) At instantiation time, by receiving an id from the instantiator.
3) When the state is refreshed.
Don't forcefully create a bin for the current page

It is done so only when a (valid) bin state wasn't recovered from local storage.
Scroll to active bin
Notify extension of new active bin
Create bin for current page

If a bin already exists for the current page, activate it.
Re-allow cursor
Update comment block
Implement request loading notification
Implement queue empty notification
Add missing CSS styling
Add missing HTML
Update changelog
Update todo