PRWIDGET-1606 - Sorted the z-index as set to 9999. Now made it auto

Matt,

If this is ok - can you let me know and I'll tag a release (or you can) - not sure if I can do this or whether we needed a pull request, but seems like the right thing to do.

I'll then up the bower.json file to point to the new tag, test it and put the change through on Jira

Adam