Improve the Cell performance (#239)

Improve the Cell performance (#239)

* Update NamedPlatformColor.cs (#10677)

* [Tizen] Make ActiveBezemElement as readonly (#10655)

* Use FlyoutBehavior on Shell if user sets it (#10456)

* Fire OnBackButtonPressed on the currently Displayed Page (#10860) fixes #7072

* Fire OnBackButtonPressed on the currently Displayed Page

* - don't run Page BackButton code when used with Shell

* Prevent styled element creation off the main thread from crashing the application (#10568)

Fixes #10561

* [Bug] Disabled Expander doesn't change its visual appearance (#10461) fixes #10362

* #10362 changed visual appearance of disabled expander

* Update Xamarin.Forms.Core/Expander.cs

* Added test case

* [C/X] Clean API and impl of OnAppTheme (#10592) fixes #10395

* [C/X] Clean API and impl of OnAppTheme

* [C] User override for app theme

- fixes #10395

* fix tests

* Update Xamarin.Forms.Core/Application.cs

Co-authored-by: Gerald Versluis <gerald.versluis@microsoft.com>
Co-authored-by: Rui Marinho <me@ruimarinho.net>
Co-authored-by: Gerald Versluis <gerald.versluis@microsoft.com>
* [Tizen] Fix TableViewRenderer on Tizen wearable device (#10911)

* [Tizen] Update the CellRenderer for extensibility (#427)

* Fix ListView Footer bug (#428)

* Synchronize between master branch of Tizen.CircularUI.Form and XSF

* Meets the alignment

* [Tizen] Improve the Switch Cell performance (#429)

CircularUI PR : #318, #319, #321

* Update the ibc file