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-components/src/repos/RepositoryEntry.tsx

@@ -154,6 +154,7 @@ const RepositoryEntry: FC<Props> = ({ repository, baseDate }) => {
         description={repository.description}
         contentRight={actions}
         link={repositoryLink}
+        ariaLabel={repository.name}
       />
     </>
   );