Map Turn Speed Control

Added toggle for "Map Turn Speed Control".

Credit goes to Pfeiferj!

https: //github.com/pfeiferj
Co-Authored-By: Jacob Pfeifer <jacob@pfeifer.dev>

selfdrive/ui/qt/onroad.h

@@ -143,6 +143,7 @@ private:
   bool turnSignalRight;
   bool useSI;
   double maxAcceleration;
+  float cruiseAdjustment;
   float laneWidthLeft;
   float laneWidthRight;
   int cameraView;