audio/video player fixes

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -166,6 +166,9 @@
     <Content Include="dashboard-ui\css\images\icons\audiocd.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="dashboard-ui\css\images\icons\expand.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="dashboard-ui\css\images\icons\filter.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>