Demote unhelpful "Network Error" from axios to warning

Summary:
Axios can create rather unhelpful errors, e.g. https://www.internalfb.com/logview/details/flipper_javascript/3201603bcb7148a3f37775f184dbda44?trace_key=f2a7f3d0e7b914b8a3adf30648263313&selected-logview-tab=shared

This should hopefully turn them into warnings.

Reviewed By: antonk52

Differential Revision: D45043390

fbshipit-source-id: 90108b7056943214d78ec9c235ac11aae9a7ecdc

desktop/flipper-ui-core/src/consoleLogTailer.tsx

@@ -59,5 +59,10 @@ function transformLogLevel(level: LoggerTypes, message: string) {
     return 'warn';
   }
 
+  // Axios will create rather unhelpful error messages which lead to unactionable tasks, e.g. T150636191
+  if (level === 'error' && message.endsWith('Network Error')) {
+    return 'warn';
+  }
+
   return level;
 }