Unicode screws up TUI

[whereswaldon]

All kinds of horrible things happen when you use wide unicode characters in the TUI. This appears to be a known issue with gocui and someone attempted to fix it here. I've tried their fix, and it does make things better, but there are still severe render problems.

This might be enough to warrant switching away from gocui entirely, much as it would pain us. The project doesn't seem to be maintained anymore, and we keep finding problems with it. I'll need to investigate in more detail before committing to that, but it's a definite possibility.

The other option is, of course, fixing gocui for this use-case. It would take a lot of work, but maybe not as much as replacing gocui. Food for thought.