ui: Fixed animation crash

* Fixed crash that occurred when resetting the current animation in the QtGraphView.

src/app/qt/view/QtGraphView.cpp

@@ -115,8 +115,6 @@ void QtGraphView::finishedTransition()
 	view->setInteractive(true);
 
 	switchToNewGraphData();
-
-	m_transition.reset();
 }
 
 void QtGraphView::switchToNewGraphData()
@@ -174,7 +172,7 @@ void QtGraphView::doRebuildGraph(
 	const std::vector<DummyNode>& nodes,
 	const std::vector<DummyEdge>& edges
 ){
-	if (m_transition)
+	if (m_transition && m_transition->currentTime() < m_transition->totalDuration())
 	{
 		m_transition->stop();
 		switchToNewGraphData();