It’s not pleasant to read

Do not reconnect if the stream error is a conflict or an host-unknown;
also add a sleep(1) in order to not DoS the server if it loops on other
conditions.

And wipe the YesNoInput from the codebase

message to a conversation tab.

When you rename one of your contact and have a conversation opened, the
nickname wasn't updated when you received new messages.

More colors, show an indicator if we changed it

going through a list with more than 1000 elements, one at a time, can be
a bit tedious. Especially if you go through it every time you receive
one of those elements.

All this crap is very brittle due to circular deps and python handling
them badly. This appears to be fixing some stuff, at the very least.

This is sed, so cleanup of imports (which can now be grouped together)
is not done yet.

Instead of chat tabs, which include MUC which doesn’t implement that.

It hasn’t worked for more than two years and no one complained.
Furthermore, poezio tries to be smart and request messages based on
previous activity, and not raw numbers.

disconnections not clearing the number of connected contacts, leading to
an ever-increasing count, and roster count not always being setup

The handlers are always there, but we only get carbons events when the
server sends them to us, which is only when we enabled them.

fix #3104

even if custom_host was set, poezio would use the dns records for the
reconnection

The roster wrapper sucks and is way too slow. Halve refresh time by more
than 50% using manually managed counters.

(API changes in slixmpp)

(bug introduced in 1c9257)

if the error has the same id as a sent message, it will be displayed
    with a cross where there is usually a checkmark (ack), and the
    received error will be appended to the message, in red.
if it does not have a know id, it will be added as another message to
    the conversation, without a nick, and in red.

move the modulename to bookmark → boookmarks
add a bookmarklist class with
remove module-level variables
do a features check on startup before trying to fetch
    the bookmarks

- slightly lower the CPU usage (callback instead of active waiting w/ sleep)
- make the terminal beep so the user knows something happened
- prevent the user “escaping” the prompt by pressing /, s, or S