Ported calc-toggle-relative-ref-fix.diff from ooo-build.
Ported calc-toggle-relative-ref-fix.diff from ooo-build.

This corrects the code used for the Shift-F4 toggle relative / absolute
reference feature in Calc, to adopt for configurable argument separators.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core