Alert staff when unsaved changes have been made RFC

RFC Alert staff when unsaved changes have been made

Anytime a staff person has modified data in any form on the staff side of Koha and then attempts to leave the page by either clicking on another link or using the browser back button, they should be alerted that they have made changes that have not been saved. The alert box should give the staff the option to either "Continue without saving" or "Cancel".

Technical Notes

• System preference should be added to disable or enable this feature