The building map should remain active when a topic is selected (see #591)

[Couapy]

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[Couapy]

Tests fails, please see #560 status.

[benel]

I have added a scenario to help you identify the regression.

[benel]

Sorry, the scenario did not correspond to the exact case of the regression. Here is a new version of the scenario: https://github.com/Hypertopic/Porphyry/blob/v7/features/portfolio_browse.feature#L27-L36

[benel]

Please note that fix-560 is now merged (then you shouldn't include it in this PR anymore).

[benel]

I suspect that the problem is that you are getting the map from selected items (instead of corpora), while it is not there anymore once you have selected the topic. Did you check the scenario manually?