C3: Fix keyboard buttons on the right getting stuck in pressed state (#22050)

* fix keyboard state stuck

* remove popup flag

* update in time

selfdrive/ui/qt/widgets/input.cc

@@ -12,7 +12,6 @@ QDialogBase::QDialogBase(QWidget *parent) : QDialog(parent) {
   Q_ASSERT(parent != nullptr);
   parent->installEventFilter(this);
 
-  setWindowFlags(Qt::Popup);
   setStyleSheet(R"(
     * {
       outline: none;

selfdrive/ui/qt/widgets/keyboard.cc

@@ -31,6 +31,9 @@ bool KeyButton::event(QEvent *event) {
       QMouseEvent mouseEvent(mouseType, touchEvent->touchPoints().front().pos(), Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
       QPushButton::event(&mouseEvent);
       event->accept();
+      if (mouseType == QEvent::MouseButtonRelease) {
+        parentWidget()->update();
+      }
       return true;
     }
   }