frp: allow the connection between a Lively property and an FRP property (again).
frp: allow the connection between a Lively property and an FRP property (again).

NikolaySuslov/LivelyKernel,pascience/LivelyKernel,pascience/LivelyKernel,NikolaySuslov/LivelyKernel,LivelyKernel/LivelyKernel,LivelyKernel/LivelyKernel,LivelyKernel/LivelyKernel,NikolaySuslov/LivelyKernel,pascience/LivelyKernel