Don't discard user data when setting or deleting steps in a multiplicator-measure.

engine/api.py

@@ -1340,10 +1340,12 @@ def setStep(trackId, stepExportDict):
     This function checks if the new step is within the limits of the current sounding pattern
     and will prevent changes or additions outside the current limits.
     """
+
     track = session.data.trackById(trackId)
     if not track: return
 
-    inRange = stepExportDict["index"] < session.data.howManyUnits and stepExportDict["pitch"] < track.pattern.numberOfSteps
+    #index is from 0 and howManyUnits*Multp is from 1 (because it is length), so we just need <, and not <=.
+    inRange = stepExportDict["index"] < session.data.howManyUnits*track.patternLengthMultiplicator and stepExportDict["pitch"] < track.pattern.numberOfSteps
     if not inRange: return
 
     session.history.register(lambda trId=trackId, v=track.pattern.copyData(): setPattern(trId, v, "Change Step"), descriptionString="Change Step")
@@ -1365,7 +1367,7 @@ def removeStep(trackId, index, pitch):
     track = session.data.trackById(trackId)
     if not track: return
 
-    inRange = index < session.data.howManyUnits and pitch < track.pattern.numberOfSteps
+    inRange = index < session.data.howManyUnits*track.patternLengthMultiplicator and pitch < track.pattern.numberOfSteps
     if not inRange: return
 
     session.history.register(lambda trId=trackId, v=track.pattern.copyData(): setPattern(trId, v, "Remove Step"), descriptionString="Remove Step")