Improve "Delete" message

[jenniferward]

Currently, when you click "Delete" on any element in Muscat, the pop-up message is the same no matter where:

It should include information related to the element being deleted. This can help prevent accidently deleting the wrong thing.

Suggestions:

• Include the type of record (source, work, institution, etc.)
• Include the kind of information displayed in the table view (composer and title in Sources, short title, author, title in Secondary Literature)

[xhero]

I imagine this happens in the index listing right? I'm not sure we can change the message there.

[jenniferward]

It happens on the "Search" page like https://muscat-test.rism.info/admin/sources or when deleting holdings like https://muscat-test.rism.info/admin/sources/1001309450/edit .