got rid of last Dart analyzer warnings

lib/src/constants.dart

@@ -1,6 +1,7 @@
 import 'dart:html';
 
 import 'package:color/color.dart';
+import 'package:over_react/components.dart';
 import 'package:platform_detect/platform_detect.dart';
 
 import 'state/geometry.dart';
@@ -68,6 +69,15 @@ Try loading an example by selecting <em>File&rarr;Load example</em>,
 or select <em>File&rarr;Open</em> to load a .sc file from your local drive.
 You can also drag and drop a .sc file from your file system to the browser.</p>''';
 
+//FIXME: OverReact's defaultErrorBoundaryLoggerName is 'over_react.ErrorBoundary' as of version 5.3.0,
+// but if we access it directly, we get a warning
+// "info: The member 'defaultErrorBoundaryLoggerName' can only be used within
+// 'package:over_react/src/component/error_boundary_api.dart' or a test."
+// So to avoid the warning, we hard-code the name. Honestly I don't even really know what an
+// ErrorBoundary logger is, so I'm not sure if this is the right thing to do.
+// const default_error_boundary_logger_name = defaultErrorBoundaryLoggerName;
+const default_error_boundary_logger_name = 'over_react.ErrorBoundary';
+
 const OXVIEW_URL = 'https://sulcgroup.github.io/oxdna-viewer/';
 
 // https://www.w3schools.com/jsref/event_button.asp

lib/src/view/design_main_error_boundary.dart

@@ -29,7 +29,7 @@ class DesignMainErrorBoundaryComponent<T extends DesignMainErrorBoundaryProps,
   @override
   get defaultProps => (newProps()
     ..identicalErrorFrequencyTolerance = Duration(seconds: 5)
-    ..loggerName = defaultErrorBoundaryLoggerName
+    ..loggerName = constants.default_error_boundary_logger_name
     ..shouldLogErrors = true);
 
   @override
@@ -100,7 +100,7 @@ class DesignMainErrorBoundaryComponent<T extends DesignMainErrorBoundaryProps,
   String get _loggerName {
     if (props.logger != null) return props.logger!.name;
 
-    return props.loggerName ?? defaultErrorBoundaryLoggerName;
+    return props.loggerName ?? constants.default_error_boundary_logger_name;
   }
 
   void _logErrorCaughtByErrorBoundary(/*Error|Exception*/ dynamic error, ReactErrorInfo info) {