* ui: Delete a bunch of CSS that we recently moved elsewhere
* ui: Add some masking placeholders
* Switch out hashicorp logo for one from structure-icons
* Change copy-button to use new copy-action icon
* Change secret-button to use new visibility-hide/show icons
* New folder icon for KVs
* Cleanup some of the icons we no longer use
* Switch from %with-exit to standard-like %with-exit-icon
* Move all chevrons to use structure-icons properly
* Use star-fill as much as possible
* Remove the remaining icons from icons/index plus the file itself
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
* Begin refactoring CSS into component folders. Moved most
components into layout/skin folders, left out a couple of ones I want
to think about more.
* Adjust grays based on recent Structure changes
* Switch to fullscreen layout for lists and detail, left aligned forms (#4435)
* Specifically use the 'actions_close' label, not just the :last-child (actions-group)
* Replace some non-var-ed colours in vaults code skin, plus prefixing (black and white)
John Cowen