Mms: Update german translation

- Change translation of "delivered" label in "Report" window
- Make use of "..." vs Unicode char consistent (use Unicode)
- Add translation of "Add to calendar" message option

Change-Id: I6453e1ee7434b1f063cffd3f432f67ad62d664f4
Merge "Mms: Update german translation" into cm-10.1
MMS - Update French translation

patch 1: removed unused strings
patch 2: added, but I don't know how to translate it,
if you find a better way do say it, please say me :)
patch 3: fix a translation
patch 4: improve translations
patch 5: fix few translations (thank's everyone)

Change-Id: I283a8503b7375fc93d5577b0d877bcd7848ee5a5