To make it harder to accidentally mess up the tour when making changes to pages, this commit adds ids with 'tour' prefixes to (nearly) all elements used by the guided tour as anchor points. The exception is where an element already had an id that is being used by something else in Bookwyrm.
Some minor changes also made to clean up the wording of the tour.
https://dequeuniversity.com/rules/axe/4.3/aria-required-children
In order to make this work, I had to translate Bulma's style so it doesn't use `ul` and `li` anymore.
The JS code had to be adapted, I also changed `button` to `tab` (seemed like a more relevant name) and added a `scrollIntoView()` on load the active tab is always visible.