Take output xunit from input instead of hardcoding to FS in Threshold Filter #1060
Description
Some filters have the output signals xunit hardcoded to time (propably simply inheriting from Filter).
(tested 3cbcf62ba9f765dc9aef170ae6550c4e815da3a0)
Reproducable by importing a dummy CSV with two columns and dummy values.
Set the X-Axis units to "Dimensionless".
Feed it into Threshold-Filter.
I also found the same behavior in the "BurstWidth" filter.