Added Generalised GxsGroupDialog

- First pass, still much to do.
	- Handles Create / Edit and View Group Info.
	- Created ForumV2GroupDialog / WikiGroupDialog / PostedGroupDialog examples overloading it.

Various Improvements to PostedListDialog.
	- Handle Hot/New/Top options.
	- Send Period back to libretroshare too.
	- Named buttons in GUI.

Added GxsGroupDialog to Wiki / Posted & ForumsV2.

Discovered nasty bug in p3Posted. If there are no posts, its hangs at a Mutex, 
but I've no idea why. (It happens prior to this code). TODO.




git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5360 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/WikiPoos/WikiDialog.h

@@ -55,6 +55,10 @@ private slots:
 	void groupTreeChanged();
 	void modTreeChanged();
 
+	void newGroup();
+	void showGroupDetails();
+	void editGroupDetails();
+
 private:
 
 void 	clearWikiPage();