Currently a single resource URL is accepted as parameter for FGB Layer.

I propose to extend our FGB handler to allow passing urls[] (additionally to url for it to not be a breaking change).

Although it is a bit counter intuitive and 1 url makes sense in 99% cases, this enhancement would really help in our usecase with 1 eodash Item containing multiple (same type of) FGB assets for different areas. Because currently there are 3 limitations with us creating a FGB Vector Layer per asset in eodash:

1. tooltip is shown only for top most layer - by design Allow composite tooltip when multiple (vector)layers can provide information #722
2. all contents of LayerControl are unnecessarily duplicated per each asset layer (opacity, timecontrol, styles)

@silvester-pari @RobertOrthofer Would you be up for this change?