Fix incorrect change field mapping on sendcoinsdialog
Fix incorrect change field mapping on sendcoinsdialog

This corrects the mapping of change to the CoinControlChangeLabel
field.

caraka/gridcoinresearch,gridcoin/Gridcoin-Research,gridcoin/Gridcoin-Research,gridcoin/Gridcoin-Research,gridcoin/Gridcoin-Research,caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch,gridcoin/Gridcoin-Research,caraka/gridcoinresearch,gridcoin/Gridcoin-Research,caraka/gridcoinresearch