Grid page can be sped up

[JDrit]

Right now, the grid page does a separate query for each grid, making it very slow. You can change this to be one complex query and then format the results in memory, which will speed up the entire page by a ton.

[sman591]

Fragment caching could also be implemented since the grids only need to be re-rendered when someone signs a packet. But speeding up the queries would be best first.