example webwallet.html does not work

I downloaded the latest release, unpacked and ran `eth-lightwallet-2.2.3/example/webwallet.html` from that on ubuntu 15.10 in the latest Chrome. I have issues with the retrieving address:
1. When creating a new wallet it shows `Retrieving addresses...` in the `Show Addresses` section which remains and seems stuck. Clicking `Show` or `Refresh` does not change this.
2. Importing the wallet from the seed and password shows an address in the `From` / `Caller` dropdowns (suggesting seed and PW are ok). Still I seem to be unable to get retrieving addresses.

Start by opening example/webwallet.html from the eth-lightwallet-2.2.3 release in Chrome on Ubuntu 15.10 and reproduce the wallet-creation and seed-import flows. Inspect why the Show Addresses section remains at “Retrieving addresses...” and verify that Show and Refresh load the addresses when the issue is fixed.

Written by the indexing model from the issue text.