[REQUEST]: Conformance View should have a 'preset' of "all unique LANG implementations"

### Is your feature request related to a problem? Please describe

Conformance view is really useful for comparing compilers, but it is REALLY time consuming to choose all the compilers I that support a language.

### Describe the solution you'd like

I'd like a 'button' that fills in the 'latest' version of every compiler for that language (including trunk perhaps, as an option?).

### Describe alternatives you've considered

None really besides the manual version, or trying to keep a conformance-with-all-selected link around.

### Additional context

Not applicable