Searching with no beacons results in divide by zero error

[kennethbruskiewicz]

If you uncheck all beacons prior to a search, the search attempts to go through but returns a divide by zero error in ListContainer at line 384 (in the loadDataPage function).

Needless to say this is a pathological case, I would both want to make it fail gracefully if a search does go through with no beacons at the very least. We could add a prompt stating that you have no beacons selected, or otherwise force the user to have at least one beacon checked at all times.

[lhannest]

No longer a divide by zero error, but it does result in a query appearing in the history box that never finishes. This is much better, but still problematic. Rather, no query should appear in the history box, and a notification should warn the user that all beacons are turned off.