(bug 45586) added section labels to the OpenID preference tab

version 2.05 20130304

added section labels to the different sections in the OpenID tab and
harmonized the OpenID  message text keys relevant for the preference
tab.

Attention: some message keys have changed. Rationale: harmonization!
removed unused 'openid-prefstext' message text.

Added qqq message descriptions.

Change-Id: I70c9e4d8dbe26cf6c468516e0e97fbab25aaaa67