Added support for friendly names and thumbnails in theme, layout, and container components. Added fallback support during loading for themes, layout, and containers.

Oqtane.Client/Themes/OqtaneTheme/Container.razor

@@ -12,4 +12,8 @@
             <ModuleInstance />
         </div>
     </div>
-</div>
+</div>
+
+@code {
+    public override string Name => "Standard Header";
+}

Oqtane.Client/Themes/OqtaneTheme/Default.razor

@@ -17,6 +17,8 @@
 </main>
 
 @code {
+    public override string Name => "Default";
+
     public override string Panes => string.Empty;
 
     public override List<Resource> Resources => new List<Resource>()

Oqtane.Client/Themes/OqtaneTheme/MultiPane.razor

@@ -14,5 +14,7 @@
 </div>
 
 @code {
-    public override string Panes => "Top;Left;Content;Right;Bottom";
+    public override string Name => "Multiple Panes";
+
+    public override string Panes => "Top,Left,Content,Right,Bottom";
 }

Oqtane.Client/Themes/OqtaneTheme/NoTitle.razor

@@ -6,4 +6,8 @@
         <ModuleActions />
     }
     <ModuleInstance />
-</div>
+</div>
+
+@code {
+    public override string Name => "No Header";
+}

Oqtane.Client/Themes/OqtaneTheme/SinglePane.razor

@@ -6,5 +6,7 @@
 </div>
 
 @code {
+    public override string Name => "Single Pane";
+
     public override string Panes => "Content";
 }