Adding SecureComponent to policy details page (#1251)

- Make Users & Policies clickeable only if user has permissions to view
  in bucket page
- Add SecureComponent to policy detail page: api calls, menu options,
  raw policy editor, etc.
- Add missing click action to groups in policy detail page
- Fix NPE in list groups for policy endpoint
- Added SecureComponent to ListPolicies page

Signed-off-by: Lenin Alevski <alevsk.8772@gmail.com>

restapi/admin_policies.go

@@ -308,7 +308,7 @@ func getListGroupsForPolicyResponse(session *models.Principal, policy string) ([
 	for _, group := range groups {
 		info, err := groupInfo(ctx, adminClient, group)
 		if err != nil {
-			LogError("unable to fetch group info %s: %v", group, err)
+			return nil, prepareError(err)
 		}
 		if info.Policy == policy {
 			filteredGroups = append(filteredGroups, group)