Feature/fix tabulator stops (#1831)

Add tab stops to action to increase accessibility of SCM-Manager with keyboard only usage. Also add a focus trap for modals to ensure the actions inside the modal can be used without losing the focus.

Co-authored-by: René Pfeuffer <rene.pfeuffer@cloudogu.com>

scm-ui/ui-webapp/src/repos/permissions/components/DeletePermissionButton.tsx

@@ -78,7 +78,13 @@ const DeletePermissionButton: FC<Props> = ({ namespaceOrRepository, permission,
   return (
     <>
       <ErrorNotification error={error} />
-      <Icon name="trash" onClick={action} />
+      <Icon
+        name="trash"
+        onClick={action}
+        onEnter={action}
+        tabIndex={0}
+        title={t("permission.delete-permission-button.label")}
+      />
     </>
   );
 };