[shared/interact_curve_view_range] Check orthonormality after zoom

Zooming in and out on a graph usually preserves orthonormality. However,
if the window has its bounds close to the limits for the values on the
axes, zooming can change the ratio.

apps/shared/interactive_curve_view_range.cpp

@@ -112,6 +112,7 @@ void InteractiveCurveViewRange::zoom(float ratio, float x, float y) {
     m_yRange.setMax(yMa, k_lowerMaxFloat, k_upperMaxFloat);
     MemoizedCurveViewRange::protectedSetYMin(yMi, k_lowerMaxFloat, k_upperMaxFloat);
   }
+  setZoomNormalize(isOrthonormal());
   m_offscreenYAxis *= ratio;
 }