User experience improvements

Oqtane.Client/Themes/Controls/Theme/MenuVertical.razor

@@ -0,0 +1,16 @@
+@namespace Oqtane.Themes.Controls
+@inherits MenuBase
+
+@if (MenuPages.Any())
+{
+    <span class="app-menu-toggler">
+        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#Menu" aria-controls="Menu" aria-expanded="false" aria-label="Toggle Navigation">
+            <span class="navbar-toggler-icon"></span>
+        </button>
+    </span>
+    <div class="app-menu">
+        <div class="collapse navbar-collapse" id="Menu">
+            <MenuItemsVertical ParentPage="null" Pages="MenuPages" />
+        </div>
+    </div>
+}