Redmine

This is a patch to correct a usability and a type of data integrity issue.

Redmine allows for issues to be assigned to versions that are closed. (Definition of "open" is that there
is at least one open issue already assigned to the version, or the current date is less than the version's effective
date.

This creates a minor integrity issue in the broader sense...i.e. issues being added to releases that may have already
gone out the door.

Secondly, from a usability point of view, the list of version numbers in the edit and update issue forms gets longer
and longer, and the one most likely to be selected is towards the bottom of the list due to the sequencing rules.

This patch restricts the list boxes to showing only those versions that are still open.

If it is really necessary to assign an issue to a closed version, it is a simple matter of taking the effective date
off the version temporarily.