Saving of Locallab tool parameters in .pp3 file

- Control spot panel parameters are now saved in .pp3 file
- Control spot curved are now visible when Locallab tool panel is
active, not visible otherwise

Limitations:
- Other Locallab tool parameters aren't saved in .pp3 file yet
- Locallab tools are temporary deactivated (time to end procparam
update)

rtgui/toolpanelcoord.h

@@ -194,10 +194,13 @@ protected:
     void foldThemAll(GdkEventButton* event);
     void updateVScrollbars(bool hide);
     void updateTabsHeader(bool useIcons);
+    void notebookPageChanged(Gtk::Widget* page, guint page_num);
 
 private:
 
     EditDataProvider *editDataProvider;
+    sigc::connection notebookconn;
+    bool photoLoadedOnce; // Used to indicated that a photo has been loaded yet
 
 public:
 
@@ -223,7 +226,7 @@ public:
     // toolpanellistener interface
     void panelChanged(rtengine::ProcEvent event, const Glib::ustring& descr);
 
-    void imageTypeChanged (bool isRaw, bool isBayer, bool isXtrans, bool isMono = false);
+    void imageTypeChanged(bool isRaw, bool isBayer, bool isXtrans, bool isMono = false);
     // profilechangelistener interface
     void profileChange(const rtengine::procparams::PartialProfile* nparams, rtengine::ProcEvent event, const Glib::ustring& descr, const ParamsEdited* paramsEdited = nullptr);
     void setDefaults(rtengine::procparams::ProcParams* defparams);
@@ -285,7 +288,7 @@ public:
 
     // imageareatoollistener interface
     void spotWBselected(int x, int y, Thumbnail* thm = nullptr);
-    void sharpMaskSelected (bool sharpMask);
+    void sharpMaskSelected(bool sharpMask);
     void cropSelectionReady();
     void rotateSelectionReady(double rotate_deg, Thumbnail* thm = nullptr);
     ToolBar* getToolBar()
@@ -306,7 +309,7 @@ public:
     void toolSelected(ToolMode tool);
     void editModeSwitchedOff();
 
-    void setEditProvider (EditDataProvider *provider);
+    void setEditProvider(EditDataProvider *provider);
 
 private:
     IdleRegister idle_register;