Various changes in Locallab GUI

- Modified some Locallab tool default parameters
- Updates some labels
- Expanders visibility state is now kept when using history
- New added tool has now its visibily state resetted to default one
- Code cleanup

rtgui/locallab.h

@@ -181,14 +181,12 @@ public:
 
     // Locallab tools expanders management functions
     void foldAllButOne(LocallabTool* except);
+    void openAllTools();
 
 private:
     // Locallab tools management functions
     void addTool(Gtk::Box* where, LocallabTool* tool);
 
-    // Locallab tools management functions
-    void openAllTools();
-
     // Locallab GUI management function
     void setParamEditable(bool cond);