fix: mouse over tooltips flickering (#6451)

mostly an issue on wayland, but this behaviour isn't wrong elsewhere

src/widgets/TooltipWidget.cpp

@@ -59,6 +59,7 @@ TooltipWidget::TooltipWidget(BaseWidget *parent)
 
     this->setStyleSheet("color: #fff; background: rgba(11, 11, 11, 0.8)");
     this->setAttribute(Qt::WA_TranslucentBackground);
+    this->setAttribute(Qt::WA_TransparentForMouseEvents);
     this->setWindowFlag(Qt::WindowStaysOnTopHint, true);
 
     // Default to using vertical layout