Cannot define a specific layer in topology app URL

It is possible to set various options via URL parameters in the Topology App.

For example, the following URL will always select vertex with id "10" and Provider "Enhanced Linkd"

/opennms/toppology?provider=Enhanced+Linkd&focus-vertices=10&szl=5

However, if multiple graphs are provided (e.g. via GraphML) it is not possible to specify a layer and therefore defining the focus may not work, as the vertices may not be in the default layer selected.

Therefore an url parameter should be provided to specifically select a layer by its namespace.