Throw instead of log error

ui/app/pages/settings/networks-tab/network-form/network-form.component.js

@@ -182,10 +182,10 @@ export default class NetworkForm extends PureComponent {
         onClear()
       }
     } catch (error) {
-      log.error('Unexpected error during form submission.', error)
       this.setState({
         isSubmitting: false,
       })
+      throw error
     }
   }