DBList properties with "Multiple Select" and "Use suggest" selected are not displayed in view mode

There's a special branch in DBListClass#displayView which is triggered when isPicker=true, and which doesn't treat multiple selected values, or proper localization. That branch seems to be very deprecated, from when isPicker had a different meaning, and now doesn't seem to be useful at all. The behavior that it tried to implement is now included in the getDisplayValue method, used in the other branch.