Group expenses by date

[scastiel]

In the expense list, now that we store the expense date (#17), we can group them by date.

[ChristopherJohnston]

It might also be good to hide expenses before the latest reimbursement by default.

I have tested a group with ~2800 items and the page becomes a little slow when rendering so many rows!

[scastiel]

A reimbursement doesn’t necessarily related to all expenses, so I can’t see how to know which transactions to hide. But you’re right, the page becomes slow when displaying many expenses.

A good alternative could be to implement some kind of pagination. Just created issue #30 for this feature.