Groupie and Transactions list

[AlanSanchezP]

TransactionsFragment is the only class in the projet that uses Groupie, so it might be better to just not use it in order to decrease final apk size. Additionally, groupie doesn't seem to provide a way to set additional click listeners inside the view (only a general click for the entire view), which might be an issue if the alert icon for unresolved transactions ends up being useful or required to do something.