Commit to external, increase revision in external property

Hello,

Usually, externals are configured to use fixed revisions, so checking
out an older revision also checks out the belonging revision of the
external.

When committing to an external, the external property still points to
the old external revision - performing an update of the outer working
copy will reset the external to the previous revision.

Is there already a commit option that would modify the external property
automatically if modifications would be committed inside an external?

-- 
Best regards,
Thomas Singer