Added dialog to confirm going to a url

This was going to be a feature just for me, I like to confirm clicking on a link rather than being sent right to it. I know about the new feature where there is a box and it writes out the link instead of just clicking and finding out, but I just like it better this way.

If you do not like this feature or do not think it will improve the app in anyway, may I suggest letting me add it as an option rather than a non-toggleable feature?

Screenshot:
![ypaez3u](https://f.cloud.github.com/assets/1205714/839459/53ddddae-f347-11e2-860f-e561e0f4a9fc.png)