Acceleration path

Added toggle to always show the vehicle's acceleration/deceleration via the onroad UI path.

selfdrive/ui/qt/onroad.cc

@@ -501,7 +501,7 @@ void AnnotatedCameraWidget::drawLaneLines(QPainter &painter, const UIState *s) {
 
   // paint path
   QLinearGradient bg(0, height(), 0, 0);
-  if (sm["controlsState"].getControlsState().getExperimentalMode()) {
+  if (sm["controlsState"].getControlsState().getExperimentalMode() || scene.acceleration_path) {
     // The first half of track_vertices are the points for the right side of the path
     // and the indices match the positions of accel from uiPlan
     const auto &acceleration = sm["uiPlan"].getUiPlan().getAccel();