add small minimum time between taps to onboarding (#23212)

Co-authored-by: Comma Device <device@comma.ai>

selfdrive/ui/qt/offroad/onboarding.cc

@@ -16,6 +16,11 @@ TrainingGuide::TrainingGuide(QWidget *parent) : QFrame(parent) {
 }
 
 void TrainingGuide::mouseReleaseEvent(QMouseEvent *e) {
+  if (click_timer.elapsed() < 250) {
+    return;
+  }
+  click_timer.restart();
+
   if (boundingRect[currentIndex].contains(e->x(), e->y())) {
     if (currentIndex == 9) {
       const QRect yes = QRect(692, 842, 492, 148);
@@ -40,6 +45,7 @@ void TrainingGuide::showEvent(QShowEvent *event) {
 
   currentIndex = 0;
   image.load(img_path + "step0.png");
+  click_timer.start();
 }
 
 void TrainingGuide::paintEvent(QPaintEvent *event) {

selfdrive/ui/qt/offroad/onboarding.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <QElapsedTimer>
 #include <QImage>
 #include <QMouseEvent>
 #include <QPushButton>
@@ -74,6 +75,7 @@ private:
 
   QString img_path;
   QVector<QRect> boundingRect;
+  QElapsedTimer click_timer;
 
 signals:
   void completedTraining();