Draft: Strip all lines that do not end with = from invite codes
Some chat clients (looking at you, Signal), only allow copying an entire message, not a selection.
It is nice if we can try our best to grab invites if they are anywhere in the message, not just the entire contents.
This MR is just a starting point to figure out if we want the feature, and then the best way to implement it.
Edited by Jonathan Dahan