Add possibility for filtering services in Lens trace view

[burriad]

Feature:
In a complex microservice landscape, the trace view in lens (and in the old view) can become confusing. It should be possible to filter a subset of services for better understandability.

Rational
This feature was once in the old web ui, where you could click on the service names which one wanted to see.

Example Scenario
In investigations, where only certain communication paths are of interest.