Layout: responsive tabbed sub-panels for views panel

[sadielbartholomew]

To implement as indicated in the mock-ups (e.g. this one) in #87, but ensuring that the result adapts to window size, for responsiveness even when only considering desktop usage.

An (implementation-)generic Issue for #90, focusing on the layout panelling & tabbing aspect (not further UI components such as menus, etc.) which is one implementation using a specific technology that may work.

[matthewrmshin]

Swipe left/right for small touchscreen devices?

[kinow]

As our tabbing system uses Lumino, I think we will either have to implement responsive tabbed ourselves, or wait/contribute to:

• Consider making Jupyter Lab mobile friendly jupyterlab/jupyterlab#3275
• Touch event support jupyterlab/lumino#77

JupyterLab is rendered OK in responsive mode.

However, it indeed responds only to mouse events. Simulating gesture/touch, it doesn't work (as reported in the issues above).

[oliver-sanders]

We went with Lumino, it works nicely.