Updated dom layout of attahcments to prevent nested dropzones (No issue
but potential to be one) and updated edit form dropzone handling so the
dropzone item card was not as distracting.
- Fixes existing broken attachment edit tabs.
- Redesigns area to move away from old tabbed interface.
- Integrates new dropzone system, for both addition and edit.
- 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
