'filter data' makes trigger reconstruction difficult/impossible

[153957]

The filter data filter can cause all values in a trace to be below the thresholds, making it had to find the trigger moment. Moreover, sometimes there are multiple solutions for reconstructing the original from the filtered data.

Interface - Show filtered data in the interface, use this to determine the pulse height and pulse integral, but keep a switch to toggle the filter on/off only for the interface.
Datastore - Send the unfiltered data to the datastore, so we can properly reconstruct information like the trigger time.

[153957]

Should be fixed in v4, the filter is not used for data sent to the datastore.
Verify with @vaneijk .