add support for Auto Prerendering

Oqtane.Client/Modules/Admin/Site/Index.razor

@@ -340,7 +340,7 @@
                         <Label Class="col-sm-3" For="prerender" HelpText="Specifies if interactive components should prerender their output" ResourceKey="Prerender">Prerender? </Label>
                         <div class="col-sm-9">
                             <select id="prerender" class="form-select" @bind="@_prerender" required>
-                                <option value="True">@SharedLocalizer["Yes"]</option>
+                                <option value="True">@SharedLocalizer["Auto"]</option>
                                 <option value="False">@SharedLocalizer["No"]</option>
                             </select>
                         </div>

Oqtane.Client/Modules/ModuleBase.cs

@@ -52,7 +52,7 @@ namespace Oqtane.Modules
 
         public virtual string RenderMode { get { return RenderModes.Interactive; } } // interactive by default
 
-        public virtual bool? Prerender { get { return null; } } // prerender at server by default
+        public virtual bool? Prerender { get { return null; } } // allows the Site Prerender property to be overridden
 
         // url parameters
         public virtual string UrlParametersTemplate { get; set; }