Avalonia 11.0.0-preview5 compatibility

[SKProCH]

Currently there is nightly release 3.0.0-avalonia11-preview3.145-nightly with preview-5 support published.
This is just combability fixes and changes to allow compiling and running apps with preview-5.
I'm sure that because of the changes in avalonia, something might not work.

If you encounter any errors, create an issue or post in the comments to that.

Current TODO list:

• Crashes when clicking on virtualizable list elements in Demo project. This is issue on the Avalonia side: ListBox inside Carousel will inherit PanelTemplate and crash when click to ListBoxItem AvaloniaUI/Avalonia#10374
• Support for Avalonia RequestedTheme feature
• Fix Slider styles
• Fix TabControl styles

[SKProCH]

AvaloniaUI/Avalonia#10374 is actually fixed right now, you should use the nightly Avalonia release. But perhaps you should recompile Material.Avalonia yourself for nightly Avalonia version (or not). I don't want to release package what depends on nightly builds.

[marklam]

There are a couple of new properties on ListBox - AreHorizontalSnapPointsRegular and AreVerticalSnapPointsRegular that are passed down to the ItemsPresenter and StackPanel/VirtualizingStackPanel in the built-in themes, but they're not in the Material theme.

https://github.com/search?q=repo%3AAvaloniaUI%2FAvalonia+areverticalsnappointsregular+language%3AXML&type=code&l=XML

Without them, a list with huge number of entries slows to a crawl when scrolling, because every entry is inspected to decide its size.

[SKProCH]

Yep, added this now. Thanks, @marklam

[SKProCH]

Closed as fixed in https://github.com/AvaloniaCommunity/Material.Avalonia/releases/tag/3.0.0-avalonia11-preview4