Fixed `PopUpList` widget to display correctly non-string objects ...using their `#displayOn:x:y:` / or `#displayString`. The popup menu shown the `#displayString` correctly however the "button" stubbornly used object's `#printString`, making the widget largely unusable with anything but strings. This commit removes this limitation.

notes
makefile
libwidg.*
libwidgInit.c
.listOfSTfiles
.dependencies
*.res
*.H
*.STH
*.exp
*.obj
*.dll
*.lib
*.ilk
*.pdb
*.sbr
*.c
*.sc
*.xc
*.vcw
*.wsp
so_locations
classList.stc
objbc
objvc
objmingw
*.@@@