Chat lobby:

- added new notifier to p3ChatService
GUI:
- list all public and private chat lobbies
- added subscribe/unsubscribe
- added new basic widget ChatTabWidget and use it in PopupChatWindow and ChatLobbyDialog
- added a tabbed dialog for every subscribed chat lobby

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@4782 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/chat/PopupChatWindow.h

@@ -54,8 +54,10 @@ protected:
 
 private slots:
     void getAvatar();
-    void tabCloseRequested(int tab);
-    void tabCurrentChanged(int tab);
+    void tabChanged(PopupChatDialog *dialog);
+    void tabInfoChanged(PopupChatDialog *dialog);
+    void tabNewMessage(PopupChatDialog *dialog);
+    void dialogClose(PopupChatDialog *dialog);
     void dockTab();
     void undockTab();
     void setStyle();