Store view settings in browser's client-side storage

[rubenthoms]

Is your feature request related to a problem? Please describe.
The view settings (i.e. the menu's pinned state or the settings groups' open/collapsed states) are currently not saved. Hence, users coming back to a page in a Webviz application do not find it as they have left it.

Describe the solution you'd like
Store the view settings in browser's client-side storage (e.g. menu's pinned state or expand/collapse state of settings' groups) https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Client-side_web_APIs/Client-side_storage

This issue was first described in #578.