Added DEFGENERIC form for LABEL-PANE-MARGINS.
Added DEFGENERIC form for LABEL-PANE-MARGINS.

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