Add support for issue tracking to file attachment comments.

File attachment comments never received support for issue tracking in the past.
The dialog showed the "Open an issue" checkbox, but it would fail if checked.

The resources and UI have all now been updated to pass the issue tracking
state around. Now, file attachment comments can have issues filed, and those
issues can be resolved, dropped, or re-opened like any others.

Created file attachments with issues opened.

I was able to resolve the issues as fixed, drop them, and reopen them without
any problems.