* Merge core libraries.
Everything below `Avalonia.Controls` into `Avalonia.Base`.
* Move new files to correct place.
* Removed unused dirs/projects,
* Removed outdated references from theme assemblies.
* Merge unit tests to match new assembly layout.
* Fixup test namespaces.
* Make directory match namespace.
* Move files to match namespace.
* Move files to match namespace.
* Fix up incorrect namespace.
`Avalonia.Visuals.Media.Imaging` -> `Avalonia.Media.Imaging`.
* Fix resource URL.
* Removed outdated dependencies.
* Added missing project reference.
* Update test namespaces.
* Fix merge error.
* Fix merge errors.
* Fix bad merge in WindowsInteropTest.csproj.
* Fix up merge errors in csprojs.
* Remove merged tests from nuke.
* Fix up namespace.
* Fix compile error.
* Fix failing tests.
Now that more unit tests are present in Avalonia.Base.UnitTests, general `AvaloniaObject` properties are getting registered. Ignore those.
Co-authored-by: Jumar Macato <16554748+jmacato@users.noreply.github.com>
`SolidColorBrush` is now mutable. There are immutable versions of
brushes in the `Avalona.Media.Immutable` namespace and the static
`Brushes.Xxx` properties return these.
And make an immutable `SceneImageBrush` and `SceneVisualBrush` which
clone the mutable `ImageBrush` and `VisualBrush` for use in the scene
graph, as we shouldn't be accessing mutable state from the render
thread.
Nikita Tsukanov
Steven Kirk
Steven Kirk
GMIKE
Dan Walmsley
Miha Markič
Steven Kirk