Filtering and grouping transactions

[DavidMS73]

This improvement consists of adding the functionality of filtering and organizing the transactions. The application currently only displays the previous transactions in chronological order. It does not allow to sort the transactions nor group the transactions. Adding this functionality would allow the user to have a better management of their transactions. The users could now group transactions by sender and understand how much money they have received from a user. Users could also group transactions by date and see how much money they have used over a period of time.