Tilix 1.9.4 has been available for a while and this would be something nice to have in our tree (I use it.).

Also, the upstream tilix project is looking for people to help with maintenance, so I am passing this information out in case there are any interested parties here:

Notes:Tilix is looking for maintainers! At the moment, only very minimal maintenance is done,
no new features will be implemented and pull-requests may be reviewed very slowly.If you are interested in helping Tilix, please chime in! 

It's a really nice gtk+3 terminal.