Add ability to remove expense

[Macludde]

Description

Right now you can only approve, you can't reject or remove bad expenses, you should be able to. It would be nice to be able to view removed expenses (I do not think we need to be able to un-remove expenses).

Describe the solution you'd like

It should not delete any information, instead it should mark it as removed and thus hide it on relevant pages (/expenses and /expenses/all). Add a new tab on /expenses/all ("rejected" or "removed") which shows removed expenses.

Make sure to add a "are you sure" button to expenses. Also, make sure to set the zmodel auth to not allow anyone to delete expenses which have been approved (if so, they should disapprove first)

Describe alternatives you've considered

• Delete the rows (could lose important data)
• Let them be (clutters up the frontend)
• separate /expenses/rejected page (duplicate code)