Refactor permissions check code

Directly check permissions and no subscription (uisettings is always initialized on frontend startup)
update permission directive to accept single string
add explicit management permission name

src-ui/src/app/components/manage/storage-path-list/storage-path-list.component.ts

@@ -29,6 +29,7 @@ export class StoragePathListComponent extends ManagementListComponent<PaperlessS
       FILTER_STORAGE_PATH,
       $localize`storage path`,
       $localize`storage paths`,
+      'storagepath',
       [
         {
           key: 'path',