Reduce Locallab settings panel GUI size

rtgui/controlspotpanel.h

@@ -205,6 +205,10 @@ public:
      * @param cond Condition to enable interactions
      */
     void setParamEditable(bool cond);
+    /**
+     * Reset expander collapse state to default one
+     */
+    void setDefaultExpanderVisibility();
 
     // Batch mode management
     // Note: Batch mode is deactivated for Locallab
@@ -396,6 +400,11 @@ private:
     Gtk::CheckButton* const savrest_;
     sigc::connection savrestConn_;
 
+    MyExpander* const expTransGrad_;
+    MyExpander* const expShapeDetect_;
+    MyExpander* const expSpecCases_;
+    MyExpander* const expMaskMerge_;
+
     Gtk::ToggleButton* const preview_;
     sigc::connection previewConn_;