Cell expects exactly 2 checks

[arlake228]

The web interface has some hardcoded 2's that are used to set the height of cells in the UI. This is problematic if you have only one check, which is desirable in some cases, as it looks like you only have half a box. Likewise things would get really screwy if you had more than 2 checks. We should replace those hardcoded 2s with a variable representing the number of checks so the interface is as flexible as the backend.