Fixed an issue where components weren't building in Visual Studio due to invalid platform configuration mapping

Author: Arlodotexe

MultiTarget/Extra.props

@@ -10,6 +10,8 @@
     <SupportedOSPlatformVersion>$(TargetPlatformMinVersion)</SupportedOSPlatformVersion>
     <TargetPlatformVersion Condition="'$(MultiTargetPlatformIdentifier)' == 'windows'">10.0.26100.0</TargetPlatformVersion>
     <TargetPlatformVersion Condition="'$(MultiTargetPlatformIdentifier)' != 'windows'">10.0.19041.0</TargetPlatformVersion>
+    
+    <Platforms>x86;x64;arm64</Platforms>
   </PropertyGroup>
 
   <!-- Workaround, improved error message when consuming from Uno projects with mismatched TFMs -->
@@ -20,9 +22,7 @@
     <None PackagePath="lib/net7.0-windows10.0.18362" Include="$(MSBuildThisFileDirectory)/_._" Pack="true" />
   </ItemGroup>
 
-  <PropertyGroup Condition="'$(IsUwp)' == 'true'">
-    <Platforms>x86;x64;arm64</Platforms>
-    
+  <PropertyGroup Condition="'$(IsUwp)' == 'true'">    
     <WindowsSdkPackageVersion Condition="'$(MultiTargetPlatformIdentifier)' == 'windows'">10.0.26100.57</WindowsSdkPackageVersion>
     <RuntimeIdentifiers Condition="'$(MultiTargetPlatformIdentifier)' == 'windows'">win-x86;win-x64;win-arm64</RuntimeIdentifiers> 
   </PropertyGroup>