"Deleted on..." toast doesn't appear after tapping a deleted form in Sent

GitHub Issue #7170 - getodk/collect

In the master version, there isn't a "Deleted on..." toast message in the "Sent" tab after tapping the grayed out name of a deleted form. The toast displays correctly in the store version (2026.1.2).

Steps to reproduce:

1. Submit a form
2. Delete the form definition
3. Go to the "Sent" tab
4. Tap on the grayed-out form name
5. Expected: Toast saying "Deleted on [date]" should appear
6. Actual: No toast appears

Tested on Android 10 (Redmi 9T) and Android 16 (Pixel 7a).