* Disable source as well as destination on editing
* Various visual/textual amends
* Make errors only appear once you've interacted with a field
* Move tests that involve selecting menus to a create form
* Revert fieldsets and checkboxes
* ui: Various CSS amends
1. Split out %icon-definition from %composite-row
2. Add hover effect to node listing
3. Fix up proxy level list components
4. Rename our various pills to use a 100-900 scale
5. Reogranize other icon related things (consul-kind and
consul-external-source)
* Fix up upstream test