Restore category chooser in OE to operation
Restore category chooser in OE to operation

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