Updated checkboxes, an MultistageParameterControl

VECTO3GUI2020/Helper/Converter/XToBoolConverter.cs

VECTO3GUI2020/Helper/IndexedStorage.cs

VECTO3GUI2020/Resources/ViewModelBindings.xaml

VECTO3GUI2020/VECTO3GUI2020.csproj

...wModel/Implementation/Document/DeclarationJobViewModel.cs

...tation/Document/DeclarationTrailerJobDocumentViewModel.cs

VECTO3GUI2020/ViewModel/Implementation/JobListViewModel.cs

...O3GUI2020/ViewModel/Implementation/MainWindowViewModel.cs

VECTO3GUI2020/ViewModel/Implementation/MessageEntry.cs

VECTO3GUI2020/ViewModel/Implementation/OutputViewModel.cs

...I2020/ViewModel/Interfaces/Document/IDocumentViewModel.cs

...ge/Implementation/InterimStageBusVehicleViewModel_v2_8.cs

...iStage/Implementation/ManufacturingStageViewModel_v0_1.cs

...ltiStage/Implementation/MultistageAuxiliariesViewModel.cs

.../MultiStage/Implementation/MultistageJobViewModel_v0_1.cs

VECTO3GUI2020/Views/JoblistView.xaml

.../Views/Multistage/CustomControls/MultiStageParameter.xaml

...ews/Multistage/CustomControls/MultiStageParameter.xaml.cs

...0/Views/Multistage/ManufacturingStageAuxiliariesView.xaml

VECTO3GUI2020/Views/Multistage/VehicleView_v2_8.xaml