Dong Bin

To reproduce: 1. Click on ComboBox 2. Press up/down

Roadmap

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This is the tracking issue of overall roadmap. Current TODO: - [x] DataValidationErrors - [x] FocusAdorner - [ ] NativeMenuBar - [x] ThemeVariantScope - [x] RefreshingContainer DONE: - [x] AutoCompleteBox...

It's not always working. https://github.com/AvaloniaUI/Avalonia/issues/13086

Open question: How to style `Dropdown list`?

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 There are several controls following this pattern: AutoComplete, Menu, ComboBox, Date/Time Picker. they look different in list container padding and list item padding.

Add Color picker specifc to RGB/HSV, sample below. 

Loading icon can be achieved by Arc + ConicRadioButton. ```xaml ``` Might be useful in button, too. 

It will be nice to have documentation of control lifecycle, explaining the order of methods executed, when elements are attached to trees, or templates are applied to control.