Graphing Data with Different Times

[RyanMaciel]

Some of the data for sensors have different time ranges. What should we do when the user requests a time range which some sensors have and others do not? At the moment the data just will not show up on a graph while the ticker is before the first data entry:

[maka-io]

At least at first, if we can identify a discrepancy in the date ranges we should show a warning (maybe a little yellow warning icon) next to the the parameter selection location. This will at least alert the user that not all data will be available for that given date.