This fixes the Qt popup widget for selecting among saved games.
The character name from each applicable save file is shown in a
button and clicking on one of those buttons restores corresponding
file. Previously all the buttons were written on top of each
other so only the final name was visible and the button for the
initial name received the click. The widget also has [quit] and
[new game] buttons.
This fixes restoring an existing save file if no character name
is supplied on the command line in the options. It does not fix
the problem where picking [new game] remembers the file name of
the last saved game in the popup's list and overwrites that file
(after requesting confirmation to do so) if/when you eventually
save. The resulting file will contain the character just saved
but be named for the earlier one. It may not be obvious because
on subsequent restores it will list names from inside the files
rather than deduce those from file names, so the clobbered/
misnamed file will just show up as the former new character.
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