As a user, I would like the app to be able to group all the bills by the bill initiators, so that I can have a better idea of what bills a certain initiator has paid for.
Detailed Description
There should be a button called "group by initiator" that toggles as the user clicks on it. When the button is on, all the bills are grouped by initiators and are ordered by the initiator indices. For the bills corresponding to a initiator, they are ordered by time/date.
Acceptance Criteria
[x] Given a function called, then the displayed bills become grouped. #79
User Story
As a user, I would like the app to be able to group all the bills by the bill initiators, so that I can have a better idea of what bills a certain initiator has paid for.
Detailed Description
There should be a button called "group by initiator" that toggles as the user clicks on it. When the button is on, all the bills are grouped by initiators and are ordered by the initiator indices. For the bills corresponding to a initiator, they are ordered by time/date.
Acceptance Criteria