fix event editor tree widget loading

Author: MjnMixael

qtfred/src/mission/dialogs/MissionEventsDialogModel.cpp

@@ -31,7 +31,6 @@ const SCP_vector<SCP_string>& MissionEventsDialogModel::getExtraHeadAnis()
 MissionEventsDialogModel::MissionEventsDialogModel(QObject* parent, fso::fred::EditorViewport* viewport, SexpTreeModel& tree_model)
 	: AbstractDialogModel(parent, viewport), m_tree_model(tree_model)
 {
-	initializeData();
 }
 
 bool MissionEventsDialogModel::apply()

qtfred/src/mission/dialogs/MissionEventsDialogModel.h

@@ -118,6 +118,8 @@ class MissionEventsDialogModel : public AbstractDialogModel {
 	const SCP_vector<MMessage>& getMessageList() const;
 	static bool getMissionIsMultiTeam();
 
+	void initializeData();
+
 	void setModified();
 
  signals:
@@ -131,7 +133,6 @@ class MissionEventsDialogModel : public AbstractDialogModel {
 	void annotationApplied(int node_index, const SCP_string& note, int r, int g, int b, bool has_color);
 
   private:
-	void initializeData();
 
 	void initializeEvents();
 	void initializeEventAnnotations();

qtfred/src/ui/dialogs/MissionEventsDialog.cpp

@@ -126,6 +126,10 @@ MissionEventsDialog::MissionEventsDialog(QWidget* parent, EditorViewport* viewpo
 			sexp_tree_view::applyVisuals(it);
 		});
 
+	// Load data now that all signals are connected, so tree-building signals
+	// (treeCleared, subtreeAdded, annotationApplied) are received by the dialog.
+	_model->initializeData();
+
 	initMessageWidgets();
 
 	initEventWidgets();