Better CSS styling with a line rule to separate the preview and the edit fields. More consistent with existing markup.

#397578: Uncouple ImageField from custom FileField hooks. Implement ImageField as a dependent widget for FileField.

#387194: Major FileField UI Refactoring. Putting File info side-by-side the preview, hiding fields that are unnecessary before uploading a file.

CSS and Markup changes to make it so that clicking upload buttons doesn't cause unexpected wrapping of text when the buttons are floated.

#303286 by dopry, drewish, moonshine, Add field to file during validation so it is available during hook_file_insert.

#362198 by mfb, prettier singleline fix for Undefined class in filefield_widget... doesn't seem like it was committed to head...

#366989 by dopry, fix php notice for Undefined index class.

good catch... thanks.

#295896 by Amitaibu and webchick, Allow file's description field to be hidden and set defaults for field settings.

reset item to default value when remove is selected instead of just changing fid to 0 so description field gets erased.

#286834 by quicksketch and dopry, so AHAH was in place... If you're using ahah make sure your wrapper id exists,
otherwise stuff can be a real mess. Also the jQuery form plugin does file submission in an iFrame and you can't
trust the post in the network console. I had to put the ahah wrapper in #prefix/#suffix and they have to be
overridden in the JS callback to prevent duplicate div wrappers appearing... I kind of wish ahah replaced it's
wrapper rather than  inserting inside the wrapper. ce la vie. but here is working JS upload and remove.