translatable msg details: status format strings (not yet timestamp format string which will be done in a separate commit)

+ strings for the message details allow i10n/i18n
+ transport method strings ("PUSH", "MMS", "SMS")
+ transport status ("pending")
+ #562 partial fix: additional new lines in message details to improve readabilty
+ ~~localization of the timestamp string~~

[UPDATED: removed the localization for the timestamp]