Add a Windows prompt to the pretty_theft module

This PR adds the Windows 7 network security prompt to the pretty_theft module. I have removed the section where the remote server is listed, and removed the cancel button in an attempt to force the user into submitting credentials. Similarly, there is no close window button on the popup.

It was necessary to modify checker() to retrieve input data using the ID instead of the element tag as the "remember my credentials" option throws off the counts. As the existing functions use the same ID names for their fields, this should not change the functionality.

There is a couple of more CSS changes that are needed to bring it fully in line with the standard prompt, but is enough to pass a cursory inspection in its current state.

![windows prompt](https://cloud.githubusercontent.com/assets/6567072/2693570/c1183424-c3b6-11e3-9465-8456037c0c13.png)