add support for new VariantType::Long

...lugins/ObserverPropertiesPlugin/widgets/VariantWidget.cpp

...techartEditorPlugin/variantjson/VariantJsonCompressor.cpp

...itorPlugin/view/widgets/ProfileDefaultValueEditWidget.cpp

...plugins/StatechartEventSenderPlugin/EventSenderConfig.cpp

...gins/StatechartEventSenderPlugin/StateParameterEditor.cpp

...marXGui/libraries/PlotterController/PlotterController.cpp