Such as emoji

The subject check was backwards...

When the platform wants to backspace into an imagespan, remove the span.
Some platforms remove the whole span when you backspace, some don't,
this at least makes it not weird on those that do not.

To try to bump us up in terms of which client gets IQs so the bob
queries are more likely to come to us.

Which we don't, because we don't store the list of outcast users...

Instead of submenu, to reduce the chance of fat fingering.

Since this causes it to render as if it had a deleted file, even if it
never had a file.

Only require them on join/rename presence, basically.  Just sending
"away" to the room with no metadata doesn't break you.

* webxdc-import-export:
  Implement WebXDC sendToChat
  Support data uri for sending file
  Implement WebXDC importFiles

Since we removed those other backgrounds ages ago...

If anything goes wrong, we just log.  If app got killed in the middle of
the process, we don't notice.  So now instead we retry after 3 seconds
whenever something goes wrong and we retry when the app comes back to
the home screen if it didn't happen yet.  Still careful to only ever do
it once.