[BUG] Flutter web getting this issue with color picker or tooltip overlay

[Raviteja11122]

======== Exception caught by gesture ===============================================================
The following assertion was thrown while handling a gesture:
setState() called after dispose(): ToolBarState#e0039(lifecycle state: defunct, not mounted)

This error happens if you call setState() on a State object for a widget that no longer appears in the widget tree (e.g., whose parent widget no longer includes the widget in its build). This error can occur when code calls setState() from a timer or an animation callback.

The preferred solution is to cancel the timer or stop listening to the animation in the dispose() callback. Another solution is to check the "mounted" property of this object before calling setState() to ensure the object is still in the tree.
This error might indicate a memory leak if setState() is being called because another object is retaining a reference to this State object after it has been removed from the tree. To avoid memory leaks, consider breaking the reference to this object during dispose().

When the exception was thrown, this was the stack:
dart-sdk/lib/internal/js_dev_runtime/private/ddc_runtime/errors.dart 297:3 throw
packages/flutter/src/widgets/framework.dart 1167:9
packages/flutter/src/widgets/framework.dart 1201:14 setState
packages/quill_html_editor/src/tool_bar.dart 944:11
packages/quill_html_editor/src/widgets/color_picker.dart 29:36
packages/flutter/src/gestures/recognizer.dart 315:24 invokeCallback
packages/flutter/src/gestures/tap.dart 652:11 handleTapUp
packages/flutter/src/gestures/tap.dart 309:5 [_checkUp]
packages/flutter/src/gestures/tap.dart 242:7 handlePrimaryPointer
packages/flutter/src/gestures/recognizer.dart 670:9 handleEvent
packages/flutter/src/gestures/pointer_router.dart 98:7 [_dispatch]
packages/flutter/src/gestures/pointer_router.dart 143:9
dart-sdk/lib/_internal/js_dev_runtime/private/linked_hash_map.dart 21:7 forEach
packages/flutter/src/gestures/pointer_router.dart 141:17 [_dispatchEventToRoutes]
packages/flutter/src/gestures/pointer_router.dart 127:7 route
packages/flutter/src/gestures/binding.dart 495:5 handleEvent
packages/flutter/src/gestures/binding.dart 475:14 dispatchEvent
packages/flutter/src/rendering/binding.dart 430:11 dispatchEvent
packages/flutter/src/gestures/binding.dart 420:7 [_handlePointerEventImmediately]
packages/flutter/src/gestures/binding.dart 383:5 handlePointerEvent
packages/flutter/src/gestures/binding.dart 330:7 [_flushPointerEventQueue]
packages/flutter/src/gestures/binding.dart 299:9 [_handlePointerDataPacket]
lib/_engine/engine/platform_dispatcher.dart 1361:5 invoke1
lib/_engine/engine/platform_dispatcher.dart 286:5 invokeOnPointerDataPacket
lib/_engine/engine/pointer_binding.dart 398:30 [_sendToFramework]
lib/_engine/engine/pointer_binding.dart 224:7 onPointerData
lib/_engine/engine/pointer_binding.dart 1001:20
lib/_engine/engine/pointer_binding.dart 930:7
lib/_engine/engine/pointer_binding.dart 531:9 loggedHandler
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 550:37 _checkAndCall
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 555:39 dcall
Handler: "onTap"
Recognizer: TapGestureRecognizer#dbe8e
debugOwner: GestureDetector
state: possible
won arena
finalPosition: Offset(685.1, 377.0)
finalLocalPosition: Offset(11.4, 16.0)
button: 1
sent tap down

[Raviteja11122]

This is happening with the OverlayEntryHidden not being removed from the screen,

Error reproducible scenario,

I'm using pageview on the screen and one of the pages has QuilEditor whenever I navigate directly to the last page. Eltooltip widget inserts hidden overlay that's not removed because of the below condition.

void _getHiddenOverlaySize(context) {
    RenderBox box = _widgetKey.currentContext?.findRenderObject() as RenderBox;
    if (mounted) {
      setState(() {
        _overlayBox = ElementBox(
          w: box.size.width,
          h: box.size.height,
        );
        _overlayEntryHidden?.remove();
      });
    }
  }

After the below changes this issue is not reproduced

Eltooltip.dart

void _getHiddenOverlaySize(context) {
    RenderBox box = _widgetKey.currentContext?.findRenderObject() as RenderBox;
    if (mounted) {
      setState(() {
        _overlayBox = ElementBox(
          w: box.size.width,
          h: box.size.height,
        );
      });
    }
    if(_overlayEntryHidden != null) {
      _overlayEntryHidden?.remove();
      _overlayEntryHidden = null;
    }
  }

toolbar.dart (setState is guarded with mounted condition)

content: ColorPicker(
        onColorPicked: (color) {
          _formatMap['color'] = color;
          _toolbarList[i] = _toolbarList[i].copyWith(isActive: true);
          widget.controller
              .setFormat(format: 'color', value: _formatMap['color']);
          if(mounted) {
            setState(() {});
          }
          if (_fontColorKey.currentState != null) {
            _fontColorKey.currentState!.hideOverlay();
          }
        },
      ),