Device visualizer - Added LedClicked event

Device properties - Added the ability to select LEDs by clicking on them in the preview

src/Artemis.UI/Screens/Settings/Device/DeviceDialogView.xaml

@@ -110,7 +110,7 @@
                                              HorizontalAlignment="Center"
                                              VerticalAlignment="Center"
                                              ShowColors="True"
-                                             Margin="0 0 100 0" />
+                                             LedClicked="{s:Action OnLedClicked}"/>
                 </Grid>
 
                 <GridSplitter Grid.Column="1" Width="15" Margin="-15 0 0 0" Background="Transparent" HorizontalAlignment="Stretch" Panel.ZIndex="3" />

src/Artemis.UI/Screens/Settings/Device/DeviceDialogViewModel.cs

@@ -8,6 +8,7 @@ using Artemis.Core;
 using Artemis.Core.Services;
 using Artemis.UI.Ninject.Factories;
 using Artemis.UI.Screens.Shared;
+using Artemis.UI.Shared;
 using Artemis.UI.Shared.Services;
 using MaterialDesignThemes.Wpf;
 using Ookii.Dialogs.Wpf;
@@ -197,6 +198,11 @@ namespace Artemis.UI.Screens.Settings.Device
             NotifyOfPropertyChange(nameof(CanExportLayout));
         }
 
+        public void OnLedClicked(object sender, LedClickedEventArgs e)
+        {
+            SelectedLed = e.Led;
+        }
+
         #endregion
     }
 }