[Azoth] Added IHaveQueriableVersion for #1660.
[Azoth Xoox] Style fixes.
[Azoth Xoox] Added PendingVersionQuery for #1660.
[Azoth Xoox] Implement IHaveQueriableVersion for #1660.
[Azoth MuC] Re-request versions for queriable entries.

Closes #1660 again.