Allow users to change layout of the weblab assignment/submission pages.
The idea is to have 3 components that can be placed in various layouts.

1. Assignment information with description
2. Container with:
   2.1 Solution input (solution field, code editor)
   2.2 Assignment facilities (discussion, console, grading)

[1] and [2] can be placed side-by-side or stacked, and within [2. Container], you can do the same for [2.1] and [2.2]

The layout can be changed client-side, and the layout preference will be stored in the local storage of the browser. Layouts are set per assignment type.

Submitted by Elmer van Chastelet on 9 June 2021 at 09:15