[CODAP] Help dialog has url link

[Nancy-Salpepi]

For phetsims/qa#1096, the title of the Help dialog is being treated as a url.

[matthew-blackman]

This is a byproduct of using the WebView component within CODAP. Speaking with Bill from CODAP, he informed me that the alternative to the WebView (the 'guide' object) is being deprecated in CODAP v3, and we should continue to use the webView. I agree that the URL text box is not ideal, but after looking into this I believe it is the best option to move ahead. Closing this issue, feel free to reopen if another solution becomes available.