fixes #1243 - Cannot set local address. If detection is wrong, chromecast fails

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -98,6 +98,9 @@
     </None>
   </ItemGroup>
   <ItemGroup>
+    <Content Include="dashboard-ui\components\chromecasthelpers.js">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="dashboard-ui\components\recordingcreator\recordingcreator.js">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>