Structural editing should treat reader tags as part of the tagged form

[PEZ]

Calva treats reader tags, like #uuid in #uuid "1e4cfe00-ddb6-4c88-8d4e-c6064149e240", as a separate form. This makes structural editing, rainbow highlighting and ignore highlighting all do the wrong thing. And at a deeper level it makes for crazy workaround hacks to navigate the code correctly when implementing various features.

Things should be rainbow highlighted, and navigated more like this:

Ignore highlight should work like this: