Improve grabbing of keyframes in effect stack

src/assets/keyframes/view/keyframeview.cpp

@@ -364,7 +364,7 @@ void KeyframeView::mouseMoveEvent(QMouseEvent *event)
     if (event->y() < m_lineHeight) {
         bool ok;
         auto keyframe = m_model->getClosestKeyframe(position, &ok);
-        if (ok && qAbs(keyframe.first.frames(pCore->getCurrentFps()) - pos - offset) * m_scale * m_zoomFactor < QApplication::startDragDistance()) {
+        if (ok && qAbs(event->x() - m_offset - ((keyframe.first.frames(pCore->getCurrentFps()) * m_scale - m_zoomStart) * m_zoomFactor)) < QApplication::startDragDistance()) {
             m_hoverKeyframe = keyframe.first.frames(pCore->getCurrentFps()) - offset;
             setCursor(Qt::PointingHandCursor);
             m_hoverZoomIn = false;