morphic: fix bug related to accessing scrollbar extent (formerly overwrote Morph.prototype)
morphic: fix bug related to accessing scrollbar extent (formerly overwrote Morph.prototype)

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