Redesign the side navigation

[LyLutter]

https://www.figma.com/file/sdbPCQbdh1JIN3kSiO7bWd/Toolbox-BB-page?type=design&node-id=115%3A2409&t=S2VkWbi0j5um1Mrq-1

https://spectrum.adobe.com/page/side-navigation/

[LyLutter]

82

[LyLutter]

HTML, Less and JS code for a side navigation. Vertical bar along the 3rd level items (teching methods) is very helpful for visual clarity. https://codemyui.com/hamburger-menu-to-sidebar-navigation-menu/

[LyLutter]

Figma file Toolbox BB page > Desktop 4

[LyLutter]

Onclick (on plan's name) the delete button pops up. The delete button should not be that prominent.

[LyLutter]

The checkmarks will only appear if the user has chosen a teaching tip for the corresponding building block.