WPF Example - Remove commented out context menu code

Left over from when the built in wasn't working (it still only works partially) due to #1767
Improve comments and add links to make clearer

Author: amaitland

CefSharp.Wpf.Example/Handlers/MenuHandler.cs

@@ -59,7 +59,8 @@ void IContextMenuHandler.OnContextMenuDismissed(IWebBrowser browserControl, IBro
 
         bool IContextMenuHandler.RunContextMenu(IWebBrowser browserControl, IBrowser browser, IFrame frame, IContextMenuParams parameters, IMenuModel model, IRunContextMenuCallback callback)
         {
-            //NOTE: Return false to use the build in Context menu - in WPF this requires you integrate into your existing message loop, read the General Usage Guide for more details
+            //NOTE: Return false to use the built in Context menu - in WPF this requires you integrate into your existing message loop, read the General Usage Guide for more details
+            //https://github.com/cefsharp/CefSharp/wiki/General-Usage#multithreadedmessageloop
             //return false;
 
             var chromiumWebBrowser = (ChromiumWebBrowser)browserControl;
@@ -105,7 +106,8 @@ bool IContextMenuHandler.RunContextMenu(IWebBrowser browserControl, IBrowser bro
                         Command = new RelayCommand(() =>
                         {
                             //BUG: CEF currently not executing callbacks correctly so we manually map the commands below
-                            //the following line worked in previous versions, it doesn't now, so custom EXAMPLE below
+                            //see https://github.com/cefsharp/CefSharp/issues/1767
+                            //The following line worked in previous versions, it doesn't now, so custom EXAMPLE below
                             //callback.Continue(item.Item2, CefEventFlags.None);
 
                             //NOTE: Note all menu item options below have been tested, you can work out the rest

CefSharp.Wpf.Example/Views/BrowserTabView.xaml

@@ -436,35 +436,6 @@
                             <RotateTransform Angle="{Binding Value, ElementName=angleSlider}" />
                         </TransformGroup>
                     </FrameworkElement.LayoutTransform>
-                    <!--<FrameworkElement.ContextMenu>
-                        <ContextMenu>
-                            <MenuItem Header="Back"
-                                      Command="{Binding WebBrowser.BackCommand}" />
-                            <MenuItem Header="Forward"
-                                      Command="{Binding WebBrowser.ForwardCommand}" />
-                            <Separator />
-                            <MenuItem Header="Print ..."
-                                      Command="{Binding WebBrowser.PrintCommand}" />
-                            <Separator />
-                            <MenuItem Header="Zoom In"
-                                      Command="{Binding WebBrowser.ZoomInCommand}" />
-                            <MenuItem Header="Zoom Out"
-                                      Command="{Binding WebBrowser.ZoomOutCommand}" />
-                            <MenuItem Header="Zoom Reset"
-                                      Command="{Binding WebBrowser.ZoomResetCommand}" />
-                            <Separator />
-                            <MenuItem Header="Show DevTools"
-                                      Command="{Binding ShowDevToolsCommand}" />
-                            <MenuItem Header="Close DevTools"
-                                      Command="{Binding CloseDevToolsCommand}" />
-                            <Separator />
-                            <MenuItem Header="View Source"
-                                      Command="{Binding WebBrowser.ViewSourceCommand}" />
-                            <MenuItem Header="Cut" Command="{Binding WebBrowser.CutCommand}"/>
-                            <MenuItem Header="Copy" Command="{Binding WebBrowser.CopyCommand}"/>
-                            <MenuItem Header="Paste" Command="{Binding WebBrowser.PasteCommand}"/>
-                        </ContextMenu>
-                    </FrameworkElement.ContextMenu>-->
                 </cefSharp:ChromiumWebBrowser>
             </Grid>
         </DockPanel>