applets/kicker: Use single-shot timer in TriangleMouseFilter

The timer does not need to repeat sending hover events.

CCBUG: 447278

applets/kicker/plugin/trianglemousefilter.cpp

@@ -13,6 +13,7 @@ TriangleMouseFilter::TriangleMouseFilter(QQuickItem *parent)
 {
     setFiltersChildMouseEvents(true);
 
+    m_resetTimer.setSingleShot(true);
     connect(&m_resetTimer, &QTimer::timeout, this, [this]() {
         m_interceptionPos.reset();
         if (!m_interceptedHoverItem) {