Oh, no, impossible! Don't forget that sometimes, up to 98 VTSs or several hundreds or thousands of PGCs can be uncalled. You know what I mean!
There is not enough space in this dialog to show everything.
Why don't you use the Find Uncalled function before calling Delete Uncalled? You can easily examine what will be removed.
[EDIT] It should be possible to list the titlesets numbers relatively easily, as it's only a single number, and I can put several numbers on the same line in the dialog. But it's impossible for Delete Uncalled PGCs.