cubicweb #160518 Sort search by order of importance [deprecated]

The search results is a mess. Do a search on and you will have to notice it.

This could be better by sorting results according to importance of types (for example in the forge Project, then Ticket, then Comment, then EmailFromMailingList...)

If this sorting is done, we could visually show which elements are of which type.

The introduction of icons could be a good help too (cf other ticket).

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