By default, don't permanently delete when recycle bin doesn't exist

I think that's a better default. We can add a flag to get back the old behavior.

It seems like we can use the FOF_WANTNUKEWARNING flag for this:

Send a warning if a file or folder is being destroyed during a delete operation rather than recycled. This flag partially overrides FOF_NOCONFIRMATION. - https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ifileoperation-setoperationflags

It's not immediately clear what they mean by warning and how we could check for that though.