show filename for dataset explorer view

Azaion.Dataset/DatasetExplorer.xaml

@@ -164,6 +164,7 @@
                             <ColumnDefinition Width="Auto" />
                             <ColumnDefinition Width="Auto" />
                             <ColumnDefinition Width="Auto" />
+                            <ColumnDefinition Width="Auto" />
                         </Grid.ColumnDefinitions>
 
                         <Grid.RowDefinitions>
@@ -248,6 +249,9 @@
             <StatusBarItem Grid.Column="3" Background="Black">
                 <TextBlock Name="StatusText" Text=""/>
             </StatusBarItem>
+            <StatusBarItem Grid.Column="4" Background="DimGray">
+                <TextBlock Name="SelectedAnnotationName" Text=""/>
+            </StatusBarItem>
         </StatusBar>
     </Grid>
 </Window>

Azaion.Dataset/DatasetExplorer.xaml.cs

@@ -197,6 +197,7 @@ public partial class DatasetExplorer
             var ann = CurrentAnnotation.Annotation;
             var image = await ann.ImagePath.OpenImage();
             ExplorerEditor.SetBackground(image);
+            SelectedAnnotationName.Text = ann.Name;
             SwitchTab(toEditor: true);
 
             ExplorerEditor.RemoveAllAnns();

Azaion.Dataset/DatasetExplorerEventHandler.cs

@@ -94,6 +94,7 @@ public class DatasetExplorerEventHandler(
                 break;
             case PlaybackControlEnum.Close:
                 datasetExplorer.SwitchTab(toEditor: false);
+                datasetExplorer.SelectedAnnotationName.Text = "";
                 break;
             case PlaybackControlEnum.ValidateAnnotations:
                 var annotations = datasetExplorer.ThumbnailsView.SelectedItems.Cast<AnnotationThumbnail>()