Email: NL translation

ps1: Email: Prompt a dialog if the user forward a mail with uncompleted attachment

ps2: Email: Display the sending mails progress as notification

ps3: Email: Support Email sync size function

ps4: suggestions

Change-Id: Ia06c620f1417a514f95f66e26ce04544f65d908b
Merge "Email: NL translation" into cm-10.2