The judges of the Superior Court, or in the discretion of the Chief Court Administrator, a committee of said judges designated by the Chief Court Administrator, shall appoint such probation officers, probation aides, clerks, detention personnel, clerical assistants and other personnel, including supervisory staff, as they deem necessary for the treatment and handling of juvenile matters within the venue districts established under § 46b-142. The Chief Court Administrator may assign, reassign and modify the assignments of such personnel and assign such duties within the Superior Court as he deems necessary for the efficient operation of the courts. Any person serving in any such capacity in the Juvenile Court on July 1, 1978, shall continue to serve in the Superior Court at the compensation he was receiving in the Juvenile Court under the compensation plan established pursuant to § 51-12, for the remainder of any term to which he was appointed. In no event shall the compensation of any such person be affected solely as a result of the transfer of jurisdiction in § 51-164s. Any of such appointees may be discharged by the appointing authority for cause and after hearing. The salaries of each of such officials shall be fixed by the judges, subject to the provisions of § 51-12.