* Extracted IInputRoot out of TopLevel
* Move some input handling out of TopLevel
* Remove old class, make layout manager private
* Removed IRenderRoot
* Make VisualTreeAttachmentEventArgs a bit more sensible
* Move ILayoutRoot to PresentationSource
# Conflicts:
# tests/Avalonia.Controls.UnitTests/TabControlTests.cs
* Updated some VisualRoot / GetVisualRoot usages
* Updated more XxxRoot usages
* More Root usages
* Addressed review
* Hurr-durr xml
* More fixes
* Maybe fix android compilation
* API diff
* Yet another cast
* I had to use MSIL analysis to detect those casts
* Fixed automation
* Fix PointerOverPreProcessor
* Fix?
* Removed yet another cast to Visual
* The amount of random downcasts is astonishing
* Maybe fix mac
* Addressed review
* Draft new API
* Push reusable ScreensBaseImpl implementation
* Fix tests and stubs
* Update ScreensPage sample to work on mobile + show new APIs
* Reimplement Windows ScreensImpl, reuse existing screens in other places of backend, use Microsoft.Windows.CsWin32 for interop
* Make X11 project buildable, don't utilize new APIs yet
* Reimplement macOS Screens API, differenciate screens by CGDirectDisplayID
* Fix build
* Adjust breaking changes file (none affect users)
* Fix missing macOS Screen.DisplayName
* Add more tests + fix screen removal
* Add screens integration tests
* Use hash set with comparer when removing screens
* Make screenimpl safer on macOS as per review
* Replace UnmanagedCallersOnly usage with source generated EnumDisplayMonitors
* Remove unused dllimport
* Only implement GetHashCode and Equals on PlatformScreen subclass, without changing base Screen
Only make the window brush transparent when we requested a transparent window and were given one, otherwise we display a transparent brush for e.g. `None` because `None` is not available when using composition.