Fix some issues found in the Test Module

. In Test Variable Encoding, if you drag & drop 2 variables in an Interaction VariablesList, it adds automatically the interaction term. If there is an allowed type, the terms should get automatically this type even if they have another type. This does not work for the interaction term: in the result, we can still see that it keeps the original types.
. In Test Sources with special attributes analysis, in the source with levels section. If you set a nominal/ordinal variable, you see the levels of the variable in the dropdown. If you duplicate the analysis, it loses these values.

QMLComponents/controls/comboboxbase.cpp

@@ -82,6 +82,8 @@ void ComboBoxBase::bindTo(const Json::Value& value)
 			index = int(std::distance(values.begin(), itr));
 		}
 	}
+	else if (!selectedValue.empty())
+		_lostValue = selectedValue;
 
 	_setCurrentProperties(index);
 
@@ -133,7 +135,7 @@ Json::Value ComboBoxBase::createJson() const
 
 bool ComboBoxBase::isJsonValid(const Json::Value &optionValue) const
 {
-	return optionValue.type() == Json::stringValue || optionValue.type() == Json::arrayValue;
+	return optionValue.type() == Json::stringValue || optionValue.type() == Json::objectValue;
 }
 
 void ComboBoxBase::setUp()
@@ -151,8 +153,10 @@ void ComboBoxBase::setUp()
 	connect(this,	&ComboBoxBase::currentValueChanged,			[this] () { if (containsVariables()) checkLevelsConstraints(); } );
 
 	if (form())
+	{
 		connect(form(), &AnalysisForm::languageChanged,			[this] () { _model->resetTermsFromSources(); }	);
-
+		connect(form(), &AnalysisForm::analysisChanged,			[this] () { _lostValue = ""; });
+	}
 }
 
 void ComboBoxBase::setUpModel()
@@ -180,6 +184,17 @@ void ComboBoxBase::termsChangedHandler()
 		{
 			auto itr = std::find(values.begin(), values.end(), fq(_currentValue));
 
+			if (!_lostValue.empty())
+			{
+				auto lostValueItr = std::find(values.begin(), values.end(), _lostValue);
+				if (lostValueItr != values.end())
+				{
+					itr = lostValueItr;
+					_orgValue = _lostValue;
+					_lostValue = "";
+				}
+			}
+
 			if (itr == values.end())	index = _getStartIndex();
 			else						index = int(std::distance(values.begin(), itr));
 		}

QMLComponents/controls/comboboxbase.h

@@ -92,6 +92,7 @@ protected slots:
 								_currentColumnType,
 								_currentColumnRealType,
 								_currentColumnTypeIcon;
+	std::string					_lostValue;
 	int							_currentIndex			= -1;
 	bool						_fixedWidth				= false;
 

QMLComponents/controls/jasplistcontrol.cpp

@@ -410,7 +410,7 @@ bool JASPListControl::checkLevelsConstraints()
 
 QStringList JASPListControl::levels() const
 {
-	return initialized() ? model()->allLevels(model()->terms()) : QStringList();
+	return model() ? model()->allLevels(model()->terms()) : QStringList();
 }
 
 QStringList JASPListControl::allowedColumnsIcons() const

QMLComponents/models/listmodelinteractionassigned.cpp

@@ -166,7 +166,7 @@ Terms ListModelInteractionAssigned::addTerms(const Terms& terms, int , const Row
 	Terms dropped;
 	if (availableModel())
 		dropped.setSortParent(availableModel()->allTerms());
-	dropped.set(terms);
+	dropped.set(checkTermsTypes(terms));
 
 	Terms newTerms = dropped.combineTerms(JASPControl::CombinationType::CombinationCross);