This PR removes prepareMsg, which put messages into the OUT_PREPARING state and was used while videos were recoded. It also removes the now-unused method isIncreation().
- It was buggy because when you forwarded a message while it was InPreparation, or when the app was killed while a message is InPreparation, the message would stay InPreparation forever.
- Android is the only UI using this InPreparation (according to @r10s, I didn't check this myself), so we can simplify some things in core, which will also make it easier to deduplicate blob files.
this PR centers the icons in the attachment selector,
the right-aligned ones looks esp. odd when no experiments are enabled.
the default now looks good,
and when all experiments are enabled, things are perfect as well.
but even if only one experiment is enabled, things are better imo
(but we anyway should optimize for default and not for experimental options)
the issue is that unset `EXTRA_HREF` is passed around as an empty string,
however `Bundle.getString(href, "index.html")` returns `index.html` only when `href` is `NULL`,
which is mostly never the case.
this results in webxdc never started with index.html,
and then not started at all
these RPC calls are probably a relict of first tries,
they are not exhaustive in their area are nor were ever used,
maybe not even working.
if we decide to go that way at some point anyways much more is needed :)
* Don't always show the sender in notifications
In 1:1 chats, don't prepend the sender name to every line. The exception is when the display name is not equal to the chat name (i.e. there is an OverwriteSenderDisplayname), in this case we still prepend it.
* Always show the "~" before the sender name if it's overridden
When we introduced this, I assume that we weren't sure whether we should
do it and only showed it in some places. But I think it's nicer to
show the same sender name everywhere, i.e. always add the "~".