* First stab at RadioButtonGroup attached property and Templated RadioButton
* RadioButtonGroupController assigning group names
* Added updates for RadioButtonGroupController on selection change
* More galleries!
* Content property propagation
* Ignore renderers if using templated views on UWP
* Apply text/font properties to Content
* Make RadioButton template parts constants
* Cache renderer availability lookup
* Add TemplateView check to CreateRenderer on iOS
* Handle Checked RadioButton GroupName changes
* Update WPF renderer
* Update macOS and Tizen renderers
* Add more unit tests, make RB Value updates propagate to RBG
* Remove Text property, updated examples; throw Exception when Content is not Text and non-Text Content is not supported
* Prevent Content exceptions in demo pages
* Colors -> Brushes
* Add default ControlTemplate example
* Set up flags for Core Gallery test pages
* Switch Android back to ToString for Content
* Back to ToString where necessary, and using the WrapperControl for UWP
* Add comment for Content
* Log a nice warning if folks try to use View as Content and it's not supported
* Add experimental flags for drag and drop tests
* Fix crashes due to missing brush experimental flag
* Make control templates from styles work alongside default templates
* Catch up on which flags are still a concern
* Fix infinite loop in platform tests
* Attempt to fix occasionaly GroupableItemsViewController disposed crash
* Make webview visible so we can verify it loaded in UI test screen shots
* Fix merge
Co-authored-by: Rui Marinho <me@ruimarinho.net>
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