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/Container.razor

@@ -1,19 +0,0 @@
-@namespace Oqtane.Themes.OqtaneTheme
-@inherits ContainerBase
-<div class="container">
-    <div class="row px-4">
-        <div class="d-flex flex-nowrap">
-            <ModuleActions /><h2><ModuleTitle /></h2>
-        </div>
-        <hr class="app-rule" />
-    </div>
-    <div class="row px-4">
-        <div class="container">
-            <ModuleInstance />
-        </div>
-    </div>
-</div>
-
-@code {
-    public override string Name => "Standard Header";
-}