Sorters should be dynamically loaded

[vankasteelj]

ATM, we define sorters (how to present data in each tab), but these sorters highly depend on the providers.

Proposition is to load dynamically the sorters from each provider (per type), to only display available sorters.

[vzamanillo]

I think the sorters should be provided by the API, if not, we could have a default common sorters in the provider.