Problem:
========
Extension:OpenID adds a new pref tab ("OpenID") [1,3],
but the <fieldset>...</fieldset>, and <legend>section header
texts</legend>
are apparently _not_ correctly set up in the page HTML, or they are not correctly
rendered.
See [3].
Pls compare [3] (sections missing) and [4] (correctly rendered, see yellow marking).
Is is a bug in the core which effects extensions ?
What am I doing wrong in function onGetPreferences [1], or, what is missing in the code ?
[1]
https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/extensions/OpenID.git;a=b…
[2]
https://bugzilla.wikimedia.org/show_bug.cgi?id=45586
[3]
http://i.imgur.com/UGqjwKK.png
[4]
http://i.imgur.com/90T3xZX.png