[Browser] Maintain multiple graph contexts in a single browser session

[shahar-biron]

Users want to be able to maintain graph views of different queries and analyze the returned data "in parallel".
We should allow opening multiple "windows" and allow the user to switch the view back and forth from different "window" views.
As another improvement - we can consider showing multiple (at least 2) windows in parallel - side by side.
The view should include at least the visualization panel and the table results view.

The browser should support at least 8 "contexts" in parallel.

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