#13 Multiple Open Not opening

[Kirk Korver]

Steps:
- Start PowerNAP
- Say "NO" to opening a file
- Menu File | Open Multiple Files...
- Browse and add Sim100.nev to the list of files
- Browse and add Sim100.nev a second time to the list
of files
- Press OK

I see:
In the list of entities, I see 216 / 432. This means
that we have only 216 open, of a possible 432.

I expect:
It should be 432/432 or, in other words, all of the
possible are actually open