interactive

Most items coming from questions on the community forum

• a proper multicategory bar example based on https://community.plotly.com/t/multicategory-axis-type-example/26392
• example of shape or annotation covering several subplots thanks to xref='paper'. Also the shapes and annotations tutorial should link to each other.
• orthographic projection example in 3d axes tutorial (or

Describe the bug
When viewing subtopics on larger screens, the topic name is displayed on the navbar.

On smaller screens, the topic name is omitted due to space constraints. Therefore, the topic name should instead be displayed above the subtopic name, as per these mocks: http

For example: https://github.com/talyssonoc/react-katex