Bug fixes

• Visual groups sorting didn't work in the front-end
• extensionset XML had the wrong types (thanks Peter)
• Different versions of Joomla! handle client_id and client tags in update streams differently (thanks Peter)
• Files always uploaded to category's root, not the intended subdirectory (thanks Peter)
• Would not list S3 bucket contents
• Could not create S3 subdirectories
• Could not upload files to S3
• Thee listing of S3 files and folders in subdirectories is prefixed with the directory's name
• Could not delete files from S3
• Layout issue in Items view
• The SHA1 and MD5 hashes were not made available in the update INI format, making it impossible to use them in custom implementations
• A new Bleeding Edge item was attempted to be created every single time a Bleeding Edge category was being accessed