Enforce in-order delivery of messages
If a message containing newlines is pasted, it gets sent as multiple messages: one message per line. As these messages are sent in parallel, they often arrive at the recipient reordered. It would be better to have an option to enforce their in-order delivery: do not submit the next message until the current one has been delivered.
I am aware this is better solved by not splitting multiline messages at all, but there seems to be no progress with markdown support, so as a workaround the proposed feature would be helpful.
Probably easier to just fix multiline, I think most of the changes in the markdown branch is not needed for that.
I would still find the proposed option useful regardlessly of multiline support. Splitting multiline messages was just an example to illustrate the issue.