Add mention of context menu and DnD collision on mobile devices (#9337)

* Add mention of context menu and DnD collision on mobile devices

diff --git a/documentation/advanced/advanced-dragndrop.asciidoc b/documentation/advanced/advanced-dragndrop.asciidoc
index 4a4499b81ffd034c6cc86ec24cee6609c39a4f82..d7ef80ac33ab6622e026069ce6d74fe2affddbbc 100644 (file)
--- a/documentation/advanced/advanced-dragndrop.asciidoc
+++ b/documentation/advanced/advanced-dragndrop.asciidoc
@@ -181,7 +181,9 @@ compatible browser, such as Mozilla Firefox 3.6 or newer.
 The HTML 5 Drag and Drop API is not yet supported by mobile browsers. To enable HTML5 DnD support on mobile devices, we have included
 an link:https://github.com/timruffles/ios-html5-drag-drop-shim/tree/rewrite:[external Polyfill]. Please note that this Polyfill is under the BSD 2 License.
 
-By default, the mobile DnD support is disabled, but you can enable it any time for a [classname]#UI#. Starting from the request where the support was enabled, all the added [classname]#DragSourceExtension#, [classname]#DropTargetExtension# and their subclasses will also work on mobile devices for that UI. The Polyfill is only loaded when the user is using a touch device.
+By default, the mobile DnD support is disabled, but you can enable it any time for a [classname]#UI#. Starting from the request where the support was enabled, all the added [classname]#DragSourceExtension#, [classname]#DropTargetExtension# and their subclasses will also work on mobile devices for that UI. The Polyfill is only loaded when the user is using a touch device. 
+
+Drag and Drop is mutually exclusive with context click on mobile devices.
 
 [source, java]
 ----