R1:90431fd101b4

Workboards - fix adding new tasks and sorting

Summary: At least on my install, sorting was pretty borked from a type issue. (e.g. "unbreak now" of 100 sorting as less than "High" of 90). Fix this with some parseInt action. Also support adding new cards with the new colsort stuff. The clever bit here is to include the task ID in the sorting vector because the task ID wins ties at the moment I think / new tasks need to show up before older tasks when they are initially created. Fixes T5716.

Test Plan…