added saving of 3d viewer state to kinematic unit gui plugin

source/RobotAPI/gui-plugins/KinematicUnitPlugin/KinematicUnitGuiPlugin.cpp

@@ -339,6 +339,7 @@ void KinematicUnitWidgetController::loadSettings(QSettings* settings)
 {
     kinematicUnitName = settings->value("kinematicUnitName", KINEMATIC_UNIT_NAME_DEFAULT).toString().toStdString();
     enableValueValidator = settings->value("enableValueValidator", true).toBool();
+    viewerEnabled = settings->value("viewerEnabled", true).toBool();
     historyTime = settings->value("historyTime", 100).toInt() * 1000;
     currentValueMax = settings->value("currentValueMax", 5.0).toFloat();
 }
@@ -347,6 +348,7 @@ void KinematicUnitWidgetController::saveSettings(QSettings* settings)
 {
     settings->setValue("kinematicUnitName", QString::fromStdString(kinematicUnitName));
     settings->setValue("enableValueValidator", enableValueValidator);
+    settings->setValue("viewerEnabled", viewerEnabled);
     assert(historyTime % 1000 == 0);
     settings->setValue("historyTime", (int)(historyTime / 1000));
     settings->setValue("currentValueMax", currentValueMax);