samples/poppopwin: upgrade to first-class sample

editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml

Index: editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml
diff --git a/editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml b/editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml
index 035469edba8aea15a4a4105ed92581808dca4dad..72fb41b61a629499caa644c8ae537da3cc228db3 100644
--- a/editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml
+++ b/editor/tools/features/com.google.dart.tools.deploy.feature_releng/build_rcp.xml
@@ -188,8 +188,8 @@ build system.  The PDE build system has to run under Eclipse.
         <copy todir="${samples.out.dir}">
             <fileset dir="${build.source.root}/samples">
                 <include name="dartiverse_search/**"/>
-                
                 <include name="sunflower/**"/>
+                <include name="pop_pop_win/**"/>
 
                 <!-- the READMEs are out of date -->
                 <exclude name="**/README"/>
@@ -203,7 +203,6 @@ build system.  The PDE build system has to run under Eclipse.
             <fileset dir="${build.source.root}/samples/third_party">
                 <include name="todomvc/**"/>
                 <include name="angular_todo/**"/>
-                <include name="pop-pop-win/**"/>
                 <exclude name="**/tool/"/>
                 <exclude name="**/.git/"/>
                 <exclude name="**/.gitignore"/>