UI - upgrading generic secret engines to v2 format (#4750)

* remove dev-leased-kv flag, handle non-secret responses in the console

* skip lease tests for now

* use the newer collection api for ember-page-object

* include generic in types that can have a v2

* add tests for generic v2

* isolate kv v2 logic in the secret-engine model and add unit tests

ui/lib/css/index.js

@@ -50,7 +50,6 @@ module.exports = {
       annotation: 'Sass SVG URI',
     });
 
-
     return mergeTrees([bulmaCheck, bulmaSwitch, bulma, sassSVGURI], { overwrite: true });
   },
 };