Try switching to Jodit

[GWBasic]

Throughout developing z3, I've found it difficult to work with CKEditor.

In this ticket: Try switching to Jodit: https://xdsoft.net/jodit/. Jodit contains a WYSIWYG mode that, in theory, should fix #5

Alternatively, try Quill: https://quilljs.com/

[GWBasic]

In progress on branch 15_TryJodit

TODOs:

• Better resize the editor. It should be within a box with a scrollbar
• Upload images

[GWBasic]

Almost complete, TODOs:

• Clean up code
• Fix the size of the editor so it always fills the screen, even when the text is short

[GWBasic]

Reopened because of failing tests