Added DEFGENERIC form for GENERIC-LIST-PANE-ITEM-STRINGS.
Added DEFGENERIC form for GENERIC-LIST-PANE-ITEM-STRINGS.

swflint/McCLIM,slyrus/mcclim,slyrus/mcclim,onixie/mcclim,swflint/McCLIM,onixie/mcclim,onixie/mcclim,swflint/McCLIM