Warn user when a datainput in use is going to be deleted

In the datainput management dialog, show a specific warning dialog if the user is about to delete datainput that is currently in use.

There is an existing dialog for informing the user of invalid datainput when opening a presentation, giving the option of removing all property bindings that use the invalid DI automatically or doing it manually.

Provide similar dialog, f.ex  ("This datainput is in use, do you want to remove associated property bindings?" Yes / No / Cancel )