* Add `role="group"` and accName to URI and custom field groups (browser)
Provides more context when editing fields (to understand what the remove, options, etc buttons are all about)
* Add `aria-describedby` to custom field value fields (browser)
provides further context other than the generic "Value" label
* Add `role="group"` and accName to URI and custom field groups, add `aria-describedby` to custom field value fields (desktop)
* Add `role="group"` and accName to URI and custom field groups, add `aria-describedby` to custom field value fields (web)
* Use `attr.aria-label` instead of `appA11yTitle`
don't need/want the tooltips appearing everywhere
* Change box-headers from generic `<div>` to semantic headings, tweak heading styles
Essentially, a late port to desktop of aspects from https://github.com/bitwarden/clients/pull/2223 (which I hadn't realised at the time also affected the desktop app)
* Change box headers in modals to `<h1>`s
* Fix/normalise modals
* Harmonise modal dialog headings, use `aria-labelledby`
