Crashlyics: Null check in CustomEntityManager

[cohenadair]

https://console.firebase.google.com/u/0/project/anglers-log/crashlytics/app/android:com.cohenadair.anglerslog/issues/07eb89109e9f5d8d1fe2f253e721c226?time=7d&versions=2.7.13%20(2026011601)&sessionEventKey=696CBB3E038B00050C2EC862FE4E50F1_2175098155706915808

Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Null check operator used on a null value
       at State.context(framework.dart:959)
       at EditableFormPageState._customEntityManager(editable_form_page.dart:124)
       at EditableFormPageState._addInputWidgets(editable_form_page.dart:311)
       at FormPageState._addFieldSelectionPage.<fn>(form_page.dart:305)
       at _SelectionPageState.build.<fn>.<fn>(form_page.dart:394)
       at PickerPageState.build.<fn>(picker_page.dart:109)
       at ModalRoute.willPop(routes.dart:1986)
       at NavigatorState.maybePop(navigator.dart:5522)
       at Navigator.maybePop(navigator.dart:2724)
       at CloseButton._onPressedCallback(action_buttons.dart:265)
       at _ActionButton.build.<fn>(action_buttons.dart:59)
       at _InkResponseState.activateOnIntent(ink_well.dart:891)
       at CallbackAction.invoke(actions.dart:596)
       at Action._invoke(actions.dart:335)
       at ActionDispatcher.invokeActionIfEnabled(actions.dart:665)
       at ShortcutManager.handleKeypress(shortcuts.dart:935)
       at _ShortcutsState._handleOnKeyEvent(shortcuts.dart:1135)
       at _HighlightModeManager.handleKeyMessage(focus_manager.dart:2244)
       at KeyEventManager._dispatchKeyMessage(hardware_keyboard.dart:1119)
       at KeyEventManager.handleRawKeyMessage(hardware_keyboard.dart:1195)
       at BasicMessageChannel.setMessageHandler.<fn>(platform_channel.dart:259)
       at _DefaultBinaryMessenger.setMessageHandler.<fn>(binding.dart:665)