Brush presets - Reset properties to default before applying preset

Layer properties - Disable keyframes when resetting to default
Device dialogs - Only dim unselected LEDs if a LED is selected
Migrations - Renamed to stay in order 
Migrations - Added migration for color gradients

src/Artemis.UI/Screens/ProfileEditor/Dialogs/LayerBrushPresetViewModel.cs

@@ -7,10 +7,12 @@ namespace Artemis.UI.Screens.ProfileEditor.Dialogs
 {
     public class LayerBrushPresetViewModel : DialogViewModelBase
     {
+        private readonly BaseLayerBrush _layerBrush;
         private ILayerBrushPreset _selectedPreset;
 
         public LayerBrushPresetViewModel(BaseLayerBrush layerBrush)
         {
+            _layerBrush = layerBrush;
             Presets = new BindableCollection<ILayerBrushPreset>();
             Presets.AddRange(layerBrush.Presets);
         }
@@ -29,6 +31,7 @@ namespace Artemis.UI.Screens.ProfileEditor.Dialogs
 
         public void SelectPreset(ILayerBrushPreset preset)
         {
+            _layerBrush.BaseProperties?.ResetAllLayerProperties();
             preset.Apply();
             Execute.OnUIThreadAsync(async () =>
             {

src/Artemis.UI/Screens/ProfileEditor/LayerProperties/Tree/TreePropertyViewModel.cs

@@ -47,7 +47,7 @@ namespace Artemis.UI.Screens.ProfileEditor.LayerProperties.Tree
 
         public void ResetToDefault()
         {
-            LayerProperty.ApplyDefaultValue(_profileEditorService.CurrentTime);
+            LayerProperty.ApplyDefaultValue();
             _profileEditorService.UpdateSelectedProfileElement();
         }
 

src/Artemis.UI/Screens/ProfileEditor/Visualization/ProfileViewModel.cs

@@ -321,7 +321,8 @@ namespace Artemis.UI.Screens.ProfileEditor.Visualization
                 dataBindingRegistration.GetDataBinding()?.UpdateWithDelta(delta);
 
             // TODO: Only update when there are data bindings
-            _profileEditorService.UpdateProfilePreview();
+            if (!_profileEditorService.Playing)
+                _profileEditorService.UpdateProfilePreview();
         }
 
         private void HighlightSelectedLayerOnSettingChanged(object sender, EventArgs e)

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

@@ -94,7 +94,7 @@ namespace Artemis.UI.Screens.Settings.Device
 
         private void CoreServiceOnFrameRendering(object sender, FrameRenderingEventArgs e)
         {
-            if (SelectedLeds == null)
+            if (SelectedLeds == null || !SelectedLeds.Any())
                 return;
 
             using SKPaint highlightPaint = new() {Color = SKColors.White};

src/Artemis.UI/Screens/StartupWizard/Steps/LayoutStepViewModel.cs

@@ -25,5 +25,23 @@ namespace Artemis.UI.Screens.StartupWizard.Steps
             StartupWizardViewModel startupWizardViewModel = (StartupWizardViewModel) Parent;
             startupWizardViewModel.Continue();
         }
+
+        #region Overrides of Screen
+
+        /// <inheritdoc />
+        protected override void OnActivate()
+        {
+            _rgbService.IsRenderPaused = true;
+            base.OnActivate();
+        }
+
+        /// <inheritdoc />
+        protected override void OnDeactivate()
+        {
+            _rgbService.IsRenderPaused = false;
+            base.OnDeactivate();
+        }
+
+        #endregion
     }
 }