Qt: new global WIDE_UI (#21977)

selfdrive/ui/qt/offroad/onboarding.h

@@ -72,8 +72,8 @@ private:
     QRect(303, 755, 718, 189),
   };
 
-  const QString IMG_PATH = vwp_w == 2160 ? "../assets/training_wide/" : "../assets/training/";
-  const QVector<QRect> boundingRect = vwp_w == 2160 ? boundingRectWide : boundingRectStandard;
+  const QString IMG_PATH = WIDE_UI ? "../assets/training_wide/" : "../assets/training/";
+  const QVector<QRect> boundingRect = WIDE_UI ? boundingRectWide : boundingRectStandard;
 
 signals:
   void completedTraining();

selfdrive/ui/qt/qt_window.h

@@ -19,7 +19,8 @@ const QString ASSET_PATH = ":/";
 const QString ASSET_PATH = "../assets/";
 #endif
 
-const int vwp_w = (Hardware::TICI() || (getenv("WIDE_UI") != NULL)) ? 2160 : 1920;
+const bool WIDE_UI = Hardware::TICI() || getenv("WIDE_UI") != nullptr;
+const int vwp_w = WIDE_UI ? 2160 : 1920;
 const int vwp_h = 1080;
 
 inline void setMainWindow(QWidget *w) {