Popular email client Mailbox introduced an "auto-swipe" feature with its arrival on Android two weeks ago, and now it has brought this function to its iOS app, which is touted to recognize your archiving and snoozing patterns over time so it learns how to process future email. Version 2.0 of Mailbox's iOS app also introduces syncing with Dropbox, which means it can now store and align your email preferences across multiple devices. This_comes after_Dropbox_stepped in_to acquire the startup more than a year ago, seeking to help it scale. Other than the iOS and Android versions, Mailbox also recently_showed off_a beta...