…ds/pop-out-panel

…ds/pop-out-panel

…ds/pop-out-panel

# Conflicts:
#	src/i18n/strings/en_EN.json

…tyRow`

Just shows notif & unread counts for main thread if the TAC is enabled.

Hopefully this is a sensible enough way. The panel will stay open of
course (ie. if you go to a different room & come back), but that's the
nature of the right panel.

Open thread panel when thread clicked in Threads Activity Centre

Make threads activity centre labs flag split out unread counts

…ds/pop-out-panel

and re-use the existing NotificationLevel

…tion_badge

Use the StatelessNotificationBadge component in ThreadsActivityCentre

…ds/pop-out-panel

Add `IndicatorIcon` to the TAC button

This makes it match the computation in determineUnreadState.
Ideally this logic should all be in one place.

Threads don't have activity if the room is muted

This incorporates the logic of not showing unread dots if the room
is muted

Re-use doesRoomHaveUnreadThreads for useRoomThreadNotifications

IndicatorIcon doesn't like having the size of its icon adjusted and
we probably shouldn't do it anyway: better to specify to the component
what size we want it.

# Conflicts:
#	src/hooks/room/useRoomThreadNotifications.ts

Fix position & size of dot on the tac button

* Add tests for `doesRoomHaveUnreadThreads`
* Add tests for `getThreadNotificationLevel`

Make the button 32x32 (and the inner icon 24x24)

Fix narrow hover background on TAC button

Add test for the ThreadsActivityCentre component

Really this mostly just needed a margin above the TAC button (which
the Add Space button did) to space it out from the, uh, spaces.
Having done that, I got annoyed by the fact that the gradients were
percentage-based and so the amount that got faded out depended on how
tall your element window was, so most of the changes here are to fix
the gradients to be fixed pixel offsets from the top & bottom.

 * New gradients with an extra colour stop to bias more of the fade
   to the extremeties
 * Fixed issue where the space panel would grow fatter when it was
   big enough to scroll because we didn't leave space for the scrollbar
 * Added fixed width for the space panel rather than trying to size it
   based on contents + padding
 * Fixed position of the separator line between the user menu and the
   spacves which should be 12px either side of the separator.

…r_gradient_2

befor the gradient starts. Also put the gradient back to simple two stops.

Smaller 16px gradient and 40px gap between threads icon & bottom space icon