Make storage cell statistic turn red if storage is too low

[hhyyrylainen]

With the gameplay changes to make storage important, it now is and players sometimes have too low storage. In those situations it'd be nice if the storage value could turn red to indicate the problem.

At least when lagging quite a bit and having like less than 3 storage, you can take ATP damage occasionally (or if below 20 FPS constantly) so some kind of heuristic needs to be come up with.