Initialize the UI on the AWT thread to avoid synchronization issues

src/main/java/com/tibagni/logviewer/LogViewerApplication.java

@@ -50,7 +50,7 @@ public static void main(String[] args) {
             .collect(Collectors.toSet());
 
     LogViewerApplication application = new LogViewerApplication();
-    application.start(initialLogFiles);
+    SwingUtilities.invokeLater(() -> application.start(initialLogFiles));
   }
 
   private static void configureUncaughtExceptionHandler() {