message: frontend: Fix RBAC create rule error handling
  The Create Access Rule page always appended the new rule to the role's
  array of existing rules. This was a problem when the rule was invalid,
  because the rule was not overwritten with an updated rule when the user
  corrected the error.
diff: @@ -143,7 +143,7 @@ class EditRule_ extends PromiseComponent {
  verbs: verbControl === VERBS_ENUM.ALL ? ['*'] : ALL_VERBS.filter(this.isVerbSelected),
  resources: resourceControl === RESOURCE_ENUM.ALL ? ['*'] : allResources.filter(this.isResourceSelected),
  };
  - const {role} = this.state;
  + const role = _.cloneDeep(this.state.role);
  role.rules = role.rules || [];
  if (this.props.rule) {
  role.rules[this.props.rule] = rule;
  