GUI: implemented sidebar for filtering on directory location

src/qtgui/confgui/confguiindex.cpp

@@ -211,6 +211,7 @@ void ConfIndexW::acceptChanges()
     delete m_conf;
     m_conf = 0;
     m_rclconf->updateMainConfig();
+    emit idxConfigPossiblyChanged();
 }
 
 void ConfIndexW::initPanels()

src/qtgui/confgui/confguiindex.h

@@ -50,6 +50,9 @@ public slots:
     void showPrefs(bool modal);
     void acceptChanges();
     QWidget *getDialog() {return m_w;}
+
+signals:
+    void idxConfigPossiblyChanged();
     
 private:
     void initPanels();