When clicking back from a thread, we want to either go back to the
channel if the thread was opened from an indicator, or to the thread
list if we opened it from there. Since ember doesn't give a nice way
to get the previous route, we need to store this ourselves. We only
do this on mobile, on desktop we just follow existing behaviour.
Also implements a chat router history.
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Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
This changes the thread header positioning of the
unread indicator to match the designs based on the route:
1. When the channel is open, show the indicator of # unread
threads with the icon
2. When the threads list is open, show no indicator since
you are on the list and can see which threads are unread
3. When a single thread is open, show the unread threads
indicator along with a left < back button, with a label
to show that this goes back to ongoing discussions
Drawer changes to come in another PR.
* Moved the settings cog from thread list to thread and
put it in a new header component
* Remove thread original message component, no longer needed
and the list item and thread indicator styles/content
will be quite different
* Start adding content (unread indicator etc.) to the thread
list item and changing structure to be more like designs
* Serialize the last thread reply when opening the thread index,
show in list and update with message bus
