Column sums can now be called without a project id.

This might fix "Bug #5770: Sum of story points not displayed in work package table" although it might be due to something else plugin related.

Before we merge this there is something that I want to confirm - that the sums should be summing all work packages and not just the total which are returned by the query. I remember asking this a while back and Jens said that it should indeed be all the work packages, but when viewing the work packages table without a project that seems pretty crazy because it's going to be summing all the work packages which are visible to that user which could be a lot and could become a resource hog.