German: Update translation

Patch set 1 - Add missing strings for:
              * widget behavior
              * SMS security limit
              * CMCircleBattery
Patch set 2 - Fixed some strings and dedupe
Patch set 3 - Add strings for home button unlock
Patch set 4 - Minor changes
              * replaced '+' with '&'
              * shortened some strings
              * changed wording

Change-Id: I1047714db03d911320a96d57d6ba05862d8539af