* Change all instances of yield/block-slots to use attributes over positional arguments
* Remove the ability to use yield/block-slots with positional params
Adds namespace support to the UI:
1. Namespace CRUD/management
2. Show Namespace in relevant areas (intentions, upstreams)
3. Main navigation bar improvements
4. Logic/integration to interact with a new `internal/acl/authorize` endpoint
* Move almost everything to use %frames
* Fix pill styles of ACL types
* Remove horizontal scrollbars from dom recycling scroller component
* Make text areas look ok in Firefox
* Remove ember-bulma-css
* New form elements, break out %toggle
* %button design tweaks
* %form-element design tweaks
* Better hashicorp logo
* Small screen CSS improvements (#4624)
1. Reduce header size when there are no breadcrumbs
2. Make the filters toggleable, closed by default
3. Reduce the size of the footer on small screens
4. Hide all non-primary columns for forms
5. Slightly change the layout of various items, mainly buttons within
forms
6. Make some confirmation dialogs work vertically on small screens. Guessing we might be better just using native confirmations on small
screens
1. Listing, filtering by action and searching by source name and
destination name
2. Edit/Create page, edits ping the API double fine, need to work through
creates and deletes
3. Currently uses a `Precedence` intention keyname that doesn't yet
exist in the real API
John Cowen