Mail composer

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This example implements a GMail-like mail composer and shows among other things how to upload files asynchronously, showing a cross-browser upload progress bar and with support for multiple files.

Some notes about this example:

• The ContactSuggestions class provides auto-completion of the addressees in the To: Cc: and Bcc: fields. The widget derives from WSuggestionPopup.
• The AttachmentEdit widget uses a WFileUpload to asynchronously upload one or more files. The upload progress bar will work even in IE6.