Fix things after testing with virtual serial port

PamhagenSysCtrl/Windows/MainWindow.xaml

@@ -15,5 +15,8 @@
 
         <Grid x:Name="ButtonPanel" Margin="5,50,5,5">
         </Grid>
+
+        <TextBlock x:Name="Status"
+                   Margin="500,50,10,10" VerticalAlignment="Top" HorizontalAlignment="Left"/>
     </Grid>
 </Window>