layouts are no longer in Sonar. What you are doing is changing the way a project is displayed and I think you expect that to apply to all projects as if it were the old layouts.
We now use screen sets which are project specific and are different for each project However, if you save a project as you describe CV on one monitor and the TV on the other when you reopen it, it should have the same display as you saved it.
To make this your default save this setup as a normal template with that setup for the screens set. You can also load it into another project as long as both are open.