Pass name of proxy effect to EffectSBSMS

Allows progress bar to show meaningful title when using SBSMS
time stretching in Change Pitch/Tempo.

src/effects/ChangePitch.cpp

@@ -185,6 +185,7 @@ bool EffectChangePitch::Process()
       double pitchRatio = 1.0 + m_dPercentChange / 100.0;
       SelectedRegion region(mT0, mT1);
       EffectSBSMS proxy;
+      proxy.mProxyEffectName = XO("High Quality Pitch Change");
       proxy.setParameters(1.0, pitchRatio);
 
       return proxy.DoEffect(mUIParent, mProjectRate, mTracks, mFactory, &region, false);

src/effects/ChangeTempo.cpp

@@ -173,6 +173,7 @@ bool EffectChangeTempo::Process()
       double tempoRatio = 1.0 + m_PercentChange / 100.0;
       SelectedRegion region(mT0, mT1);
       EffectSBSMS proxy;
+      proxy.mProxyEffectName = XO("High Quality Tempo Change");
       proxy.setParameters(tempoRatio, 1.0);
       success = proxy.DoEffect(mUIParent, mProjectRate, mTracks, mFactory, &region, false);
    }

src/effects/SBSMSEffect.h

@@ -31,6 +31,11 @@ public:
    void setParameters(double tempoRatio, double pitchRatio);  // Constant ratio (tempoRatio, pitchRatio)
    static double getInvertedStretchedTime(double rateStart, double rateEnd, SlideType slideType, double outputTime);
    static double getRate(double rateStart, double rateEnd, SlideType slideType, double t);
+
+protected:
+   wxString mProxyEffectName { XO("SBSMS Time / Pitch Stretch") };
+   wxString GetName() override { return mProxyEffectName; };
+
 private:
    bool ProcessLabelTrack(Track *track);
    double rateStart, rateEnd, pitchStart, pitchEnd;
@@ -41,6 +46,9 @@ private:
    double mCurT0;
    double mCurT1;
    float mTotalStretch;
+
+   friend class EffectChangeTempo;
+   friend class EffectChangePitch;
 };
 
 #endif