browser frame URL must have two dots in it

[danvisel]

1. Open Sophie.
2. Make a new book.
3. Insert a browser frame.
4. Click on the browser halo to open the browser HUD.
5. Try to enter the URL "http://sophie2.org"

Right now, URLs used in the browser need to have two dots - so " http://www.sophie2.org" would be fine and " http://dev.sophie2.org" would also be fine, but "http://sophie2.org" isn't allowed (even though that's a valid URL). I don't think we should be checking for this; this comes up during demos, where the temptation is to write a URL very quickly.

[deni]

• I think we should change the regular expression for checking whether a String is a valid URL to the following: ".{3,}[.].{2,}", i.e. 3 or more characters followed by a . and then 2 or more characters.

• It is very simple and accepts strings such as "example..com", but in this case it is better to allow an invalid value than to forbid a valid one.

[meddle]

Merged on the trunk at [8717]. Good

[meddle]

Closing all the tickets before M Y1