We now make direct calls to `send_flags_update` for
seting collapsed/uncollapsed, rather than going through
the `batched_updaters` mechanism.
Also the methods in `message_flags` to set
collapsed/uncollapsed now take a single message.
We now do all of the main logic for starring/unstarring
a message in `message_flags.toggle_starred`:
* mark the message as read (just in case)
* update the UI (i.e. the green star in the message)
* update the server
The calling code in both the click handler and the hotkey
handler remains simple--they just handle minor details like
finding the message and clearing popovers.
For updating the server, we now call the new
`send_flag_update` helper.
And we continue to delegate some of the logic to
`ui.update_starred`, but we remove some code there that's
now pushed up to `message_flags.toggle_starred`.
This change should be mostly transparent to users, but it
does remove some inconsistent behaviors between the click
handler and the hotkey handler. Before this change, the
click handler was more aggressive about updating the UI
and marking the message as read. For people using the "*"
key to star/unstar, they probably would only have noticed
different behavior on a slow connection or in an edge
case scenario where only half of the message was onscreen.
More importantly, by simplifying how we talk to the server,
this eliminated up to a one-second lag due to the debounce
logic in the batch_updater code. The complicated debounce
logic is only really needed for batch-updating "read"
messages, and it was overkill and sluggish for starring
messages.
Last but not least, we add defensive code for the local
echo case. (Users have to wait till the message gets acked
to star it.)
This experiment has been disabled for everyone for a while: if we
bring something like this back, it is not likely to be exactly the same,
and will be different enough to require a different implementation.
As it is, the summarization code was making a few code paths (rendering
especially) more complex, and is worth removing for simplicity's sake.
(imported from commit 6ac8cdc9f7077a5a1da01ab4268aba3db0bc43f8)
