Add compiler extension to handle platforms.

Custom actions to print EULA and validate install directories are
defined in WixUIExtension compiler extension, to handle
platform-specific custom actions referred to from `DoAction` control
events. This is the least-worst solution, given the `DoAction` approach
used in the WixUI authoring and anyone customizing a WixUI set.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/ext/UI/wixext/UIExtensionFactory.cs b/src/ext/UI/wixext/UIExtensionFactory.cs
index 141aa39f..a16a9899 100644
--- a/src/ext/UI/wixext/UIExtensionFactory.cs
+++ b/src/ext/UI/wixext/UIExtensionFactory.cs
@@ -11,6 +11,7 @@ namespace WixToolset.UI
         protected override IReadOnlyCollection<Type> ExtensionTypes => new[]
         {
             typeof(UIExtensionData),
+            typeof(UICompiler),
         };
     }
 }