* main:
Fix image icons
Revert "Merge pull request #345 from basecamp/cascade-layers"
Fine tune notifications states
Remove empty helper
Use an icon for the button
Show button on collection page and notif settings
Add involvement types to accesses
Extract a couple components
Add cascade layers to all CSS files
This provides a way to set the level of involvement that a user has with
a collection, and from which we determine the level of notifications to
send. Users can be access-only, watching, or being notified about
everything.
If you're access-only, you won't get an notifications. If you're
watching, you'll only get notifications for the items you're watching
(which includes the items you've been assigned, have commented on, etc).
If you're set to everything you'll get notifications about all activity
in that collection.
This change replaces our previous concept of subscriptions. Where
previously you'd subscribe to a collection to get notifications in it,
now you'll simply set the notification level on your access.
We use a true/false preference so we can tell the difference between
disabling the watch vs never having the watch. This is so we can toggle
off and on the preferences for a container (like the bucket) without
losing any bubble-specific preferences.
Previously when an item was `created`, we'd track the event, update the
summary text, and broadcast the notifications. But now that we have a
draft state, we shold do all of this when it's published instead.
Jorge Manrubia