AD_FillWaves: Fix calculation of failed sweeps for Rheobase

PSQ_Rheobase does not have a per Sweep QC labnotebok setting. Therefore we
decided in 23f0714 (Analysis functions dashboard, 2018-05-06) to use, for
passing set QC, the last spiking/non-spiking sweeps as passed and
everything else as failed.

Unfortunately it was not anticipated that only two sweeps are present and
in that case we have one sweep both failing and passing as Duplicate/RMD
clips its passed indices.

By using the set difference we avoid this issue.

Close #2017

Packages/MIES/MIES_AnalysisFunctions_Dashboard.ipf

@@ -349,7 +349,7 @@ static Function AD_FillWaves(win, list, info)
 						lastValid  = DimSize(spikeDetection, ROWS) - 1
 						ASSERT(Sum(spikeDetection, firstValid, lastValid) == 1, "Unexpected spike/non-spike duo")
 						Duplicate/FREE/R=[firstValid, lastValid] sweeps, passingSweeps
-						Duplicate/FREE/R=[0, firstValid - 1] sweeps, failingSweeps
+						WAVE/Z failingSweeps = GetSetDifference(sweeps, passingSweeps)
 					else
 						Duplicate/FREE sweeps, failingSweeps
 						WAVE/Z passingSweeps

Packages/tests/HardwareAnalysisFunctions/UTF_PatchSeqRheobase.ipf

@@ -422,7 +422,7 @@ static Function PS_RB4_REENTRY([str])
 
 	variable sweepNo, setPassed, i, numEntries, onsetDelay
 	variable initialDAScale, stepsize
-	string key
+	string key, browser
 
 	WAVE numericalValues = GetLBNumericalValues(str)
 
@@ -473,6 +473,19 @@ static Function PS_RB4_REENTRY([str])
 
 	CommonAnalysisFunctionChecks(str, sweepNo, {setPassed})
 	CheckPSQChunkTimes(str, {20, 520, 1023, 1523})
+
+	// check passing/failing sweeps
+	browser = DB_FindDataBrowser(str)
+	CHECK_PROPER_STR(browser)
+
+	DFREF dfr = BSP_GetFolder(browser, MIES_BSP_PANEL_FOLDER)
+
+	WAVE/T listWave = GetAnaFuncDashboardListWave(dfr)
+	CHECK_EQUAL_VAR(GetNumberFromWaveNote(listWave, NOTE_INDEX), 1)
+
+	WAVE/T infoWave = GetAnaFuncDashboardInfoWave(dfr)
+	CHECK_EQUAL_STR(infoWave[0][%$"Passing Sweeps"], "0;1;")
+	CHECK_EQUAL_STR(infoWave[0][%$"Failing Sweeps"], "")
 End
 
 static Function PS_RB5_preAcq(string device)