Turn almost all Listeners into abstract interfaces

rtgui/icmpanel.h

@@ -30,10 +30,9 @@
 
 class ICMPanelListener
 {
-
 public:
-    virtual ~ICMPanelListener() {}
-    virtual void saveInputICCReference(Glib::ustring fname, bool apply_wb) {}
+    virtual ~ICMPanelListener() = default;
+    virtual void saveInputICCReference(const Glib::ustring& fname, bool apply_wb) = 0;
 };
 
 class ICMPanel :
@@ -127,6 +126,7 @@ public:
     void setBatchMode(bool batchMode);
     void setDefaults(const rtengine::procparams::ProcParams* defParams, const ParamsEdited* pedited = nullptr);
     void adjusterChanged(Adjuster* a, double newval);
+    void adjusterAutoToggled(Adjuster* a, bool newval);
 
     void wpChanged();
     void wtrcinChanged();