court may appoint receiver where circumstances just and convenient: A mortgagee in possession may relieve himself of his position and responsibility
by appointing a receiver; and the court may appoint a receiver after a mortgagee has taken possession if the circumstances render it just and convenient: for example, if the mortgagee in possession refuses to satisfy equitable interests, or if there is a strong prima facie case for setting the conveyance to him aside; but not otherwise, unless the rents and profits are in dange