“A civil restraint order is likely to be appropriate when the litigant's conduct has the hallmark of one who is content to indulge in a course of conduct which evidences an obsessive resort to litigation and a disregard of the need to have reasonable grounds for making an application to the court. Normally we would not expect a civil restraint order to be made until after the litigant has made a number of applications in a single set of proceedings all of which have been dismissed because they were totally devoid of merit.”