Display only selection for active layer in infowindow

[jokd]

Is your feature request related to a problem? Please describe.
It can be hard to see what features belong to a certain layer when selecting features from multiple layers, eg when a layer has "imageFeatureInfoMode": "always" and is always queryable.

Describe the solution you'd like
A setting to only show the infowindows active layer. In case of listLayout: true perhaps only show features in groups that are expanded? Or toggle the groups so that only one can be expanded.

Describe alternatives you've considered
A new selection style for features in layers that are not active in the infowindow.

Additional context
listLayout:false

"listLayout": true

[jokd]

Any opinions on this? Or a preferrable solution? Otherwise I will probably solve this in some way and make it opt-in.

[jokd]

I have come up with a solution for this that sets a property for each feature to be considered when styling the layers. That way there are three different styles for a feature; selected, inActiveLayer and highlighted. That way features in a layer that is not active can be styled with nothing and that way invisible.

However the way the different states are handled today is about to be rewritten due to a bug, #1773. I will push my PR but set it as draft.

[jokd]

One downside with propsed solution (and the state used today as well) using properties for features is that they will follow along when exporting the layers unless explicitely removed.