Show the name of the resource pool and potentially the class name in the session launcher

[olevski]

The above is just an example. And it can be worse if the session launchers are using the same name and same environment but on different pools. Then if a user wants to pick a specific pool they have to dig trough the off canvas to see which pool is used on which launcher.

This will become even more important with the imposing of more strict resource usage limits.

[olevski]

We can do something like Rstudio - Rocker on <resource pool name> / <resource class name> or some variation like that.