Fix saving lift/gamma/gain effect results in broken ui.

Fixes #790

src/assets/model/assetparametermodel.cpp

@@ -251,6 +251,12 @@ QStringList AssetParameterModel::getKeyframableParameters() const
     return paramNames;
 }
 
+const QString AssetParameterModel::getParam(const QString &paramName)
+{
+    Q_ASSERT(m_asset->is_valid());
+    return m_asset->get(paramName.toUtf8().constData());
+}
+
 void AssetParameterModel::setParameter(const QString &name, int value, bool update)
 {
     Q_ASSERT(m_asset->is_valid());

src/assets/model/assetparametermodel.hpp

@@ -185,6 +185,9 @@ public:
     /* @brief Returns a list of the parameter names that are keyframable */
     QStringList getKeyframableParameters() const;
 
+    /** @brief Returns the current value of an effect parameter */
+    const QString getParam(const QString &paramName);
+
 protected:
     /* @brief Helper function to retrieve the type of a parameter given the string corresponding to it*/
     static ParamType paramTypeFromStr(const QString &type);

src/assets/view/assetparameterview.cpp

@@ -85,7 +85,7 @@ void AssetParameterView::setModel(const std::shared_ptr<AssetParameterModel> &mo
     });
     emit updatePresets();
     connect(m_model.get(), &AssetParameterModel::dataChanged, this, &AssetParameterView::refresh);
-    if (paramTag.endsWith(QStringLiteral("lift_gamma_gain"))) {
+    if (paramTag.endsWith(QStringLiteral("lift_gamma_gain")) || m_model->getParam(QStringLiteral("mlt_service")).endsWith(QStringLiteral("lift_gamma_gain"))) {
         // Special case, the colorwheel widget manages several parameters
         QModelIndex index = model->index(0, 0);
         auto w = AbstractParamWidget::construct(model, index, frameSize, this);