* 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* Removed outdated references from theme assemblies.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* Removed outdated dependencies.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.
Giuseppe Lippolis
Nikita Tsukanov
Steven Kirk
Steven Kirk
GMIKE
Dan Walmsley
Miha Markič
Steven Kirk