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.Server/wwwroot/css/app.css

@@ -90,6 +90,17 @@ app {
     color: gray;
 }
 
+.app-moduleactions .dropdown-submenu {
+    position: relative;
+}
+
+    .app-moduleactions .dropdown-submenu > .dropdown-menu {
+        top: 0;
+        left: 100%;
+        margin-top: 0px;
+        margin-left: 0px;
+    }
+
 .app-progress-indicator {
     background: rgba(0,0,0,0.2) url('../loading.gif') no-repeat 50% 50%;
     width: 100%;
@@ -214,4 +225,4 @@ app {
     position: absolute;
     right: 0.75rem;
     top: 0.5rem;
-}
+}

Oqtane.Server/wwwroot/js/app.js

@@ -0,0 +1,8 @@
+function subMenu(a) {
+    event.preventDefault();
+    event.stopPropagation();
+
+    var li = a.parentElement, submenu = li.getElementsByTagName('ul')[0];
+    submenu.style.display = submenu.style.display == "block" ? "none" : "block";
+    return false;
+}