If a status in a conversation view controller creates a work item to
update the timestamp in 1 minute, but the view controller is deinit'd
before that time elapses, the mastodonController instance will be nil,
resulting in a crash.
The DispatchWorkItems's are cancelled by the respective cell deinit
methods. But if the work item has already begun, cancelling it has no
effect, potentially leading to a crash in the conditions described above
are true. Using a weak reference to self fixes this.
Additionally, don't unnecessarily recreate the work items every time.
They don't capture any local variables, only self, so nothing changes.
The timestamp update work item shouldn't retain a reference to the cell.
It can be unowned because when the cell is deinit'd, the work item will
be cancelled.
Also, copy the state between screens, so e.g. expanding a status in the
timeline and then opening that conversation already has that status
expanded.
This intentionally doesn't store the sensitive attachment visibility
state, since showing text when not necessary is less dangerous than for
images. (Possibly a preference for this in the future?)
Closes#55
Closes#49
This is a workaround for UIKit's built-in suggested context menu actions
not working as expected, and should be replaced with the system thing if
it becomes possible.
Shadowfacts