Added aria labels and button roles for buttons in the
item/Collection pane. This includes buttons in the header
as well as rows from notes, related, collections, and
attachments section that act as buttons. Also added
missing aria-labelledby for mini-itembox rows below
attachment preview to have filename, dateModified
and etc. properly labelled.
This also covers most of vpat 16.
This does not affect how tags/header/itemBox entries are announced.
There is a separate issue with NVDA and JAWS sometimes struggling
with announcing text inside of `editable-text` component,
so this will be handled separately.
91bc1a3e2d