New "mark as completed" command and minor bug fixes.

Added a new command 'm' to mark a job as completed without having to look
at the full set of prompts to edit the item.

Enforced limits of 45 characters for job names and 60 characters for regions.

Fixed a minor bug where the list would cut off at 21 items instead of 20.

Fixed a minor bug where negative totals were not recognized by the parser.