Revert "Included 'off' computers in the labstats available count, and don't show labstats info if the total number of computers is 0."

This reverts commit 822ebe682bf5836b7382798596a597c78d073c8f.
Only show labstats info if the total number of computers is greater than 0.
Merge branch 'master' of github.com:uw-it-aca/spacescout-ios