on cancel tapped if searched field focused cause a bug

[iMajeed16]

Hello

I have been testing this package as I am using it in my app, while doing so I have faced a bug.

Tapped on the search icon to search in the list and typed a word and then tapped cancel it showed me a bug. Also, tapped on the search but did not type anything when canceling it showed me the same bug.

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following assertion was thrown building BottomSheet(dirty, dependencies: [_InheritedTheme,
_LocalizationsScope-[GlobalKey#40979]], state: _BottomSheetState#c5d72):
This widget has been unmounted, so the State no longer has a context (and should be considered
defunct).
Consider canceling any active work during "dispose" or using the "mounted" getter to determine if
the State is still active.

The relevant error-causing widget was:
  MaterialApp MaterialApp:file:///D:/~/~/~/lib/main.dart:327:26

When the exception was thrown, this was the stack:
#0      State.context.<anonymous closure> (package:flutter/src/widgets/framework.dart:942:9)
#1      State.context (package:flutter/src/widgets/framework.dart:948:6)
#2      S2State.theme (package:awesome_select/src/widget.dart:933:35)
#3      S2State.modalConfig (package:awesome_select/src/widget.dart:974:53)
#4      S2State._showModalByType.<anonymous closure> (package:awesome_select/src/widget.dart:1554:38)
#5      _BottomSheetState.build (package:flutter/src/material/bottom_sheet.dart:287:30)
#6      StatefulElement.build (package:flutter/src/widgets/framework.dart:4870:27)
#7      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4754:15)
#8      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4928:11)
#9      Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#10     StatefulElement.update (package:flutter/src/widgets/framework.dart:4960:5)
#11     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#12     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6291:14)
#13     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#14     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6291:14)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#16     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6291:14)
#17     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#18     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#19     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4928:11)
#20     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#21     StatefulElement.update (package:flutter/src/widgets/framework.dart:4960:5)
#22     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#23     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#24     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4928:11)
#25     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#26     StatefulElement.update (package:flutter/src/widgets/framework.dart:4960:5)
#27     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#28     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#29     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#30     StatelessElement.update (package:flutter/src/widgets/framework.dart:4834:5)
#31     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#32     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#33     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#34     ProxyElement.update (package:flutter/src/widgets/framework.dart:5108:5)
#35     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#36     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#37     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#38     ProxyElement.update (package:flutter/src/widgets/framework.dart:5108:5)
#39     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#40     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#41     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#42     ProxyElement.update (package:flutter/src/widgets/framework.dart:5108:5)
#43     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#44     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#45     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#46     ProxyElement.update (package:flutter/src/widgets/framework.dart:5108:5)
#47     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#48     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#49     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#50     ProxyElement.update (package:flutter/src/widgets/framework.dart:5108:5)
#70     StatelessElement.update (package:flutter/src/widgets/framework.dart:4834:5)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:3501:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4780:16)
#73     Element.rebuild (package:flutter/src/widgets/framework.dart:4477:5)
#74     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2659:19)
#75     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:882:21)
#76     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:363:5)
#77     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15)
#78     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1081:9)
#79     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:995:5)
#83     _invoke (dart:ui/hooks.dart:151:10)
#84     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:308:5)
#85     _drawFrame (dart:ui/hooks.dart:115:31)
(elided 3 frames from dart:async)

Thanks.