Profiles - Save folder open/closed state

Profiles editor - Save last selected element and reselect it
Profile editor - Save pan/zoom position
Profile editor - Added option to resume normal playback on focus loss

src/Artemis.UI/Screens/ProfileEditor/ProfileTree/ProfileTreeView.xaml

@@ -97,6 +97,11 @@
                 <b:Interaction.Behaviors>
                     <behaviors:TreeViewSelectionBehavior SelectedItem="{Binding SelectedTreeItem}" />
                 </b:Interaction.Behaviors>
+                <TreeView.ItemContainerStyle>
+                    <Style TargetType="{x:Type TreeViewItem}" BasedOn="{StaticResource MaterialDesignTreeViewItem}">
+                        <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay, FallbackValue=False}"/>
+                    </Style>
+                </TreeView.ItemContainerStyle>
                 <TreeView.Resources>
                     <HierarchicalDataTemplate DataType="{x:Type treeItem:FolderViewModel}" ItemsSource="{Binding Items}">
                         <ContentControl s:View.Model="{Binding}" />

src/Artemis.UI/Screens/ProfileEditor/ProfileTree/ProfileTreeViewModel.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Input;
 using Artemis.Core;
@@ -24,8 +25,6 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
         {
             _profileEditorService = profileEditorService;
             _profileTreeVmFactory = profileTreeVmFactory;
-
-            CreateRootFolderViewModel();
         }
 
         public TreeItemViewModel SelectedTreeItem
@@ -33,7 +32,7 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
             get => _selectedTreeItem;
             set
             {
-                if (!_updatingTree && SetAndNotify(ref _selectedTreeItem, value) && !_draggingTreeView) 
+                if (!_updatingTree && SetAndNotify(ref _selectedTreeItem, value) && !_draggingTreeView)
                     ApplySelectedTreeItem();
             }
         }
@@ -54,6 +53,7 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
         protected override void OnInitialActivate()
         {
             Subscribe();
+            CreateRootFolderViewModel();
             base.OnInitialActivate();
         }
 
@@ -83,6 +83,13 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree
 
             ActiveItem = _profileTreeVmFactory.FolderViewModel(folder);
             _updatingTree = false;
+
+            Execute.PostToUIThread(async () =>
+            {
+                await Task.Delay(1500); 
+                SelectedTreeItem = ActiveItem.GetAllChildren().FirstOrDefault(c => c.ProfileElement == _profileEditorService.SelectedProfileElement);
+            });
+            
         }
 
         #region IDropTarget

src/Artemis.UI/Screens/ProfileEditor/ProfileTree/TreeItem/FolderViewModel.cs

@@ -1,4 +1,5 @@
-using Artemis.Core;
+using System.ComponentModel;
+using Artemis.Core;
 using Artemis.Core.Services;
 using Artemis.UI.Ninject.Factories;
 using Artemis.UI.Shared.Services;
@@ -19,5 +20,35 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree.TreeItem
         }
 
         public override bool SupportsChildren => true;
+
+        public override bool IsExpanded
+        {
+            get => ((Folder) ProfileElement).IsExpanded;
+            set => ((Folder) ProfileElement).IsExpanded = value;
+        }
+
+        private void ProfileElementOnPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == nameof(Folder.IsExpanded))
+                NotifyOfPropertyChange(nameof(IsExpanded));
+        }
+        
+        #region Overrides of Screen
+
+        /// <inheritdoc />
+        protected override void OnInitialActivate()
+        {
+            ProfileElement.PropertyChanged += ProfileElementOnPropertyChanged;
+            base.OnInitialActivate();
+        }
+
+        /// <inheritdoc />
+        protected override void OnClose()
+        {
+            ProfileElement.PropertyChanged -= ProfileElementOnPropertyChanged;
+            base.OnClose();
+        }
+
+        #endregion
     }
 }

src/Artemis.UI/Screens/ProfileEditor/ProfileTree/TreeItem/LayerViewModel.cs

@@ -33,5 +33,7 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree.TreeItem
         public Layer Layer => ProfileElement as Layer;
         public bool ShowIcons => Layer?.LayerBrush != null;
         public override bool SupportsChildren => false;
+
+        public override bool IsExpanded { get; set; }
     }
 }

src/Artemis.UI/Screens/ProfileEditor/ProfileTree/TreeItem/TreeItemViewModel.cs

@@ -52,6 +52,7 @@ namespace Artemis.UI.Screens.ProfileEditor.ProfileTree.TreeItem
         public bool CanPasteElement => _profileEditorService.GetCanPasteProfileElement();
 
         public abstract bool SupportsChildren { get; }
+        public abstract bool IsExpanded { get; set; }
 
         public List<TreeItemViewModel> GetAllChildren()
         {