Automatically anonymize loan history settings

Purpose: Create settings in UI for users to anonymize closed loans.

*As a staff member, I want a patron’s loans to be anonymized automatically, so that their circulation history is private & the library complies with regulations on privacy.

Scenarios

1. Scenario
   • Given the Settings app
   • When Circulation is selected
   • Then show the setting Loan History
2. Scenario
   • Given the Loan History setting
   • When selected
   • Then show settings for closed loans
     • Pane header:
       • title: Loan history
       • Save & close button
     • Heading: Closed loans
     • Body: Anonymize closed loans
     • Radio buttons:
       • Immediately after loan closes
       • <field accepting integers> <dropdown menu for Day(s), Week(s), Month(s), default: Select interval> after loan closes
       • Never
3. Scenario
   • Given a loan history setting
   • When the user has made changes
   • Activate the Save & close button
4. Scenario
   • Given a loan history setting, with changes made
   • When the user attempts to navigate away
   • Then show the unsaved changes modal
5. Scenario
   • Given a loan history setting, with the <X time> after loan closes radio button selected
   • When the inputs are invalid:
     • No value, non-integer or negative number in <field accepting integers>
     • Dropdown menu set to Select interval
   • Then do not allow the user to save