Fix #1011: different transactions getting the same sortKey in FetchWalletOmniTransactions
Fix #1011: different transactions getting the same sortKey in FetchWalletOmniTransactions

OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore