Convert almost all IdleRegister::add() calls to add(std::function<>)

rtgui/tonecurve.h

@@ -72,7 +72,7 @@ protected:
     rtengine::ProcEvent EvHistMatching;
     rtengine::ProcEvent EvHistMatchingBatch;
     rtengine::ProcEvent EvClampOOG;
-    
+
     // used temporarily in eventing
     double nextExpcomp;
     int nextBrightness;
@@ -108,7 +108,6 @@ public:
     void clip_changed ();
     bool clip_changed_ ();
     void waitForAutoExp ();
-    bool autoExpComputed_ ();
     void enableAll ();
     void curveChanged (CurveEditor* ce) override;
     void curveMode1Changed ();
@@ -131,7 +130,6 @@ public:
     );
 
     void histmatchingToggled();
-    bool histmatchingComputed();
 
     void autoExpChanged(double expcomp, int bright, int contr, int black, int hlcompr, int hlcomprthresh, bool hlrecons) override;
     void autoMatchedToneCurveChanged(rtengine::procparams::ToneCurveParams::TcMode curveMode, const std::vector<double>& curve) override;