Merge pull request #268 from mcav/pop3-trash-connection

Bug 945669 - [email/POP3] Make FolderStorage.sliceOpenMostRecent not trigger connection establishment for POP3 folders other than the inbox; clean up tests. r=asuth
Merge pull request #269 from mcav/multi-bodypart

Bug 945606 - [email/back] regression in snippet creation for multi-bodypart messages on IMAP, POP3 possibly affected too. r=asuth
Bug 939375 - [email] POP3: UX for when there are too many messages in the spool