Ability to edit previous expenses

[jbochnik]

Task test:

1. Start on the quick entry page
2. Create a new expense by adding a name and cost to the fields titled name and cost
3. Click the "add expense" button to create the expense
4. The page will reload and the expense you just created should appear under the tip of the day box.
5. click on the blue "edit" button for the expense that you just created.
6. you should be redirected to a new page that in bold says "Edit expense" below the green nav bar.
7. Change the name of the expense by adding a new name to the "expense" field
8. Change the cost to a new cost by adding a cost to the "Price" field
9. Click the green "edit expense" button
10. Know you should be redirected back to the quick entry page
11. Ensure that the expense that you edited is now displayed below the tip of the day box with its new name and new price