Globally purge charges by itype
Idea: add a limiting feature to Globally Purge Charges that allows for choosing which fines to clear by itype.
We use itypes to delineate lending in addition to the location code. With libraries transitioning to fines-free policies and seeking to waive existing overdue fines for patrons on some items (but not all), the current function structure complicates matters, as it only allows for limiting by location code, rather than by item type. There are ways to work around it but they are cumbersome.