Tighten some more permissions down

src/Twig/OrganisationsExtension.php

@@ -62,6 +62,10 @@ class OrganisationsExtension extends AbstractExtension implements GlobalsInterfa
 
                 return $authorizer->runCallback($currentUser, 'is_organisation_admin', $currentUser->id, $organisation->id);
             }),
+            new TwigFunction('hasRole', function ($roleSlug) {
+                $currentUser = $this->services->currentUser;
+                return $currentUser->roles()->where('slug', $roleSlug)->count() > 0;
+            }),
         ];
     }