Rolled out HTML editor field and store logic across all target entity
types. Cleaned up WYSIWYG input logic and design.
Cleaned up some injected classes while there.
- Also extracted shelf to book view elements to own partial.
- Fixed some existing logic including image param handling in update
request and activity logging against correct element.
- Now has a hover state to match other items.
- Now spans the full sidebar with like other items.
- Also updated chapter-toggle to a chapter-contents component, following
the newer component system.
- Improves animation smoothness
- Changed animation slideup/down animations to use max-height instead of height
to better avoid jutter at the end.
- Cleaned spacing to match page items in books listing.
- Primarily moved and re-organised view files.
- Included readme within views to document the convention.
- Fixed some issues with page field select list in previous commit.
- Tweaked some route names while going through.
- Split some views out further.
Closes#2805
