The limitations of time within which various actions may be com-
menced and pursued within this state to enforce the rights of the parties are extended, only insofar as the enforcement of rights which may be instituted by way of counterclaim and cross-claim, so as to allow parties, up to and including the last day upon which the answer or other defensive pleadings should have been filed, to commence the prosecution and enforcement of rights by way of counterclaim and cross-claim, provided that the final date allowed by such limitations for the commencement of such actions shall not have expired prior to filing of the main action.