Merge pull request #9146 from asutherland/email-decode-attachment-names

Bug 853757 - [Buri][Email/IMAP] Attachment names are not being MIME-word decoded. r=squib. a=blocking-b2g=tef+(cherry picked from commit f1ecd026aee670aa11a9f103b48ff325794f7677)
Merge pull request #9144 from fabi1cazenave/sendButton-l12y-bug859105

bug 859105: add an l10n-id attribute to the "Send" button, r=stas(cherry picked from commit c117dc2dfdf90fc9a3ad9d429d78d87f66013d21)