support for retroshare links in gxs forums

- only group can link at the moment

added more nxs tests and better cleanup
- test ability sync with a delayed circle load 

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7384 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/gxschannels/GxsChannelDialog.h

@@ -41,7 +41,8 @@ public:
 	virtual QString helpText() const { return ""; } //MainPage
 
 //	virtual UserNotify *getUserNotify(QObject *parent);
-
+protected:
+        RetroShareLink::enumType getLinkType() { return RetroShareLink::TYPE_CHANNEL; }
 private slots:
 	void settingsChanged();
 	void toggleAutoDownload();