Move all this code to one pair of functions

[baconpaul]

src//common/Parameter.cpp:         i = (int)((1 / 0.99) * (ef - 0.005) * (float)(val_max.i - val_min.i) + 0.5) + val_min.i;
src//common/Parameter.cpp:         float fv = 0.005 + 0.99 * ((float)(i - val_min.i)) / ((float)(val_max.i - val_min.i));
src//common/Parameter.cpp:      return 0.005 + 0.99 * ((float)(val.i - val_min.i)) / ((float)(val_max.i - val_min.i));
src//common/Parameter.cpp:      return 0.005 + 0.99 * ((float)(val_default.i - val_min.i)) / ((float)(val_max.i - val_min.i));
src//common/Parameter.cpp:      val.i = (int)((1 / 0.99) * (v - 0.005) * (float)(val_max.i - val_min.i) + 0.5) + val_min.i;
src//common/gui/CMenuAsSlider.cpp:         float r = 0.005 + 0.99 * ( iv - iMin ) / ( float) ( iMax - iMin );
src//common/gui/CMenuAsSlider.cpp:                   float r = 0.005 + 0.99 * ( iv - iMin ) / ( float) ( iMax - iMin );
src//common/gui/CNumberField.cpp:   i_value = (int)((1 / 0.99) * (val - 0.005) * (float)(i_max - i_min) + 0.5) + i_min;
src//common/gui/CNumberField.cpp:      i_value = (int)((1.f / 0.99f) * (value - 0.005f) * (float)(i_max - i_min) + 0.5) + i_min;
src//common/gui/CNumberField.cpp:   i_value = (int)((1.f / 0.99f) * (value - 0.005f) * (float)(i_max - i_min) + 0.5) + i_min;
src//common/gui/SurgeGUIEditor.cpp:                  val = 0.005 + 0.99 * ( (float)( im ) / (n_scenemodes-1) );
src//common/gui/SurgeGUIEditor.cpp:               fval = 0.005 + 0.99 * ((float)(guiscenemode) / (n_scenemodes - 1));

I'm going to add the inline functions to Parameter.h now to fix #3096 in one spot but want to get all of these too. May choose to not do it in the same commit though so added an issue.

[baconpaul]

The functions to use are in Parameter so Parameter:: then

   static inline float intScaledToFloat( int v, int vmax, int vmin = 0 ) 
   static inline int intUnscaledFromFloat( float f, int vmax, int vmin = 0 )