[For 1.6] Advanced Sidebox 2.1.1

[Wildcard]

Advanced Sidebox 2.0.6 Released (Available on GitHub Now)

Changes:

• Improvements were made in the language system thanks to reports from Destroy666 and Tanweth
  
• Tanweth helped to improve the Who's Online module's handling of avatars when maintaining the aspect ratio
  
• The upgrade script was adjusted to catch a possible error with the default addon module's language thanks to reports from Tanweth
  
• An error where it was impossible to save the Theme Exclude setting if it was empty at POST time was corrected thanks to a report from govindsinghnegi
  
• Tanweth discovered an error in the module system that effected both radio and PHP setting types and it has been fixed

To upgrade, deactivate, overwrite and re-activate.

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I'd like to take a minute and show my appreciation for Destroy666 and Tanweth. Both of you have been a tremendous help and have provided thorough testing and much-needed counsel.

Thanks to you both