Make display of histogram conditional on an analysis section in info.json
Add information widget composed of two subwidgets, still only for static search

Going forward we can make all views involving search/histogram views use this
widget, and dynamically choose what kind of widget they want for the top part
(at the moment, we have only pipeline or static information).
Create histogram mapping from info.json instead of re-calculating it.

Now that this information is required in the info.json (at least for
static search/histogram), we no longer need the Base64LookupTable
javascript file.