Update to Avalonia 0.10.8 -- better performance in X11

fvim.fsproj

@@ -79,11 +79,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="0.10.7" />
-    <PackageReference Include="Avalonia.Desktop" Version="0.10.7" />
-    <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.7" />
-    <PackageReference Include="Avalonia.Diagnostics" Version="0.10.7" />
-    <PackageReference Include="Avalonia.Svg" Version="0.10.7.1" />
+    <PackageReference Include="Avalonia.Desktop" Version="0.10.8" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.8" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="0.10.8" />
+    <PackageReference Include="Avalonia.Svg" Version="0.10.8" />
 
     <PackageReference Include="FSharp.Control.Reactive" Version="5.0.2" />
     <PackageReference Include="FSharp.Data" Version="4.2.2" />
@@ -95,7 +94,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Svg.Model" Version="0.5.7.1" />
     <PackageReference Include="TaskBuilder.fs" Version="2.1.0" />
     <PackageReference Include="UACHelper" Version="1.3.0.5" />
   </ItemGroup>

svg.fs

@@ -14,10 +14,11 @@ open Avalonia.Svg
 let private s_assetLoader = new AvaloniaAssetLoader() :> Svg.Model.IAssetLoader
 let private s_factory = AvaloniaLocator.Current.GetService<Platform.IPlatformRenderInterface>()
 
+// ported from: https://github.com/wieslawsoltes/Svg.Skia/blob/master/src/Avalonia.Svg/AvaloniaPicture.cs
 type SvgPicture(data: string) =
   let svg = Svg.SvgDocument.FromSvg(data)
-  let picture = 
-    match Svg.Model.SvgExtensions.ToModel(svg, s_assetLoader) with
+  let picture: SKPicture = 
+    match Svg.Model.SvgExtensions.ToModel(svg, s_assetLoader, ignoreAttributes=Unchecked.defaultof<_>) with
     | pic,_,_ -> pic
   let _commands = ResizeArray<DrawCommand>()
   let mutable m_brush: SolidColorBrush = null