apps.Graphviz: output to plain svg + svg viewer fixes for new chrome
apps.Graphviz: output to plain svg + svg viewer fixes for new chrome

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