[embed] Enable configuration of any view when in embed mode

[tiffon]

Requirement - what kind of business use case are you trying to solve?

Enhancement to embed mode, e.g. query param embed=....

Problem - what in Jaeger blocks you from solving the requirement?

Currently (in #263), when embedding a search view, it's not possible to customize the embedded view of trace-details. For instance, if the query param mapCollapsed is added to the embedded search page URL it will not be carried over to the trace detail view when a trace is selected from the search results.

Proposal - what do you suggest to solve the problem or improve the existing situation?

Propagate embed query params when changing views.

Any open questions to address

Seems like this will be a breaking change so embed=vN+1 should be used to scope the effects of this change, where N is the current embed version.