enhanced ModuleActions component to display panes in a submenu, added more containers to Oqtane theme, added more panes to MultiPane layout, added module outline in edit mode to distinguish modules in panes, consolidated to use a single default AdminPane named "Content", fixed bug related to custom Admin Container behavior

Oqtane.Client/Themes/OqtaneTheme/Containers/DefaultNoTitle.razor

@@ -0,0 +1,10 @@
+@namespace Oqtane.Themes.OqtaneTheme
+@inherits ContainerBase
+
+<div class="container">
+    <ModuleActions /><ModuleInstance />
+</div>
+
+@code {
+    public override string Name => "No Background Color - No Title";
+}