Add local parameter to each group to override global parameter

[ShuxinLin]

Problem Statement
The group feature is great! But it seems not possible to configure each groups differently.

Proposed Solution
One feature I think can be really useful is to add local/nested parameter (e.g. show-summary, sort) to each group so that the value override the glocal configuration.

Use Cases
One meaningful example is to add different sortings to each group. For stocks, I'd like to sort the tickers by change percent, while for indices, I'd like to keep the user-defined order (i.e. sort=user).

[achannarasappa]

Thanks for the suggestion! I can see how this would be helpful especially for sorting - I'll add it to the roadmap