Allow for editing of select fields in Prime Contract when "locked"

It would be desirable to edit select fields in the prime contract even after the contract has posted to intacct and "locked".

Examples of such fields include the "Start and Finish Dates" the "actual" dates will generally be updated after the contract is posted, and it does not make sense to have to constantly unlock/unlink the contract to update these values (which anyways do not post to Sage Intacct).