proxy/register: Fill in text and respond to button clicks.
proxy/register: Fill in text and respond to button clicks.

Now correctly shows the user the registration details, and allows the
user to close the dialog. But registration is a no-op.

chromium/ballista,chromium/ballista,benfredwells/ballista,mgiuca/ballista,mgiuca/ballista,benfredwells/ballista