Added more opcodes for 5.3.0

Signed-off-by: Vincent-Michael <Vincent_Michael@gmx.de>
Added handler CMSG_SET_ACTIVE_MOVER for 5.3.0
Added handler CMSG_QUERY_PLAYER_NAME for 5.3.0
Added handler SMSG_REALM_QUERY_RESPONSE for 5.3.0
Added handler SMSG_ACTION_BUTTONS for 5.3.0

Signed-off-by: Vincent-Michael <Vincent_Michael@gmx.de>