LP2002343: cash reports end date cannot come before start date

LP2002343: cash reports end date cannot come before start date

To test:
1. Log in as a staff member with a branch-level home library (global admin account will work only if you change it from CONS to, say, BR1)
2. As that staff member, bill some patrons and then accept some payments from them
3. Go to admin > local admin > cash reports
4. Try to set the end date before the start date.
5. Note that you get an alert, and cannot press the Submit button.
6. Confirm that when you enter valid dates and select your staff member's home ou, the reports display as usual.

Signed-off-by: Jane Sandberg <js7389@princeton.edu>