Add Staking Icon

	modified:   src/bitcoinrpc.h
	modified:   src/kernel.cpp
	modified:   src/kernel.h
	modified:   src/main.cpp
	modified:   src/qt/bitcoin.qrc
	modified:   src/qt/bitcoingui.cpp
	modified:   src/qt/bitcoingui.h
	modified:   src/rpcblockchain.cpp
	modified:   src/wallet.cpp
	modified:   src/wallet.h