Patch to improve the pinentry quality bar

[Bernhard Herzog]

Hello,

here's a patch that improves the layout of the pinentry dialogs when the 
quality bar is shown.  The patch includes the following changes:

 - The gtk2 and qt based pinentries now have the quality bar below the text
   entry for the passphrase and both are aligned and have the same size.

 - Both pinentry show a tooltip for the quality bar that briefly explains its
   purpose.

 - The quality bar in the gtk2 pinentry used to change its height when the
   user began to type because the text shown in the bar changed. This is now
   fixed.

TODO:

 - Translate the texts introduced by the patch.

Possible further improvements:

The tooltip of the quality bar is a very generic hint that tells the user to 
ask the administrator for details about the quality criteria.  It would be 
better if the tooltip were set by the administrator so that it explains the 
the actual rules for the quality.

Regards,

   Bernhard

-- 
Bernhard Herzog                              Intevation GmbH, Osnabrück
Amtsgericht Osnabrück, HR B 18998             http://www.intevation.de/
Geschäftsführer: Frank Koormann, Bernhard Reiter, Dr. Jan-Oliver Wagner
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