Add title bar to each workbench element
Collapse/show control for workbench controls
Merge pull request #89 from Kitware/workbench-collapse-controls

Workbench collapse controls
Restyle workbench header, use dropdown for layouts
Make empty state for workbench elements more obvious
Instructional UI for initial workbench state
Use same mixin between different layout container templates
Merge pull request #90 from Kitware/layout-dropdown

Layout dropdown
Add more layouts

We were lacking a 2-element layout, and a 3-element layout.
Merge pull request #91 from Kitware/more-layouts

Add more layouts
Modal control selection behavior within workbench cells
Merge pull request #92 from Kitware/workbench-control-selection

Modal control selection behavior within workbench cells
Added a histogram widget for static images, renamed existing histograms.
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.