CMFileManager: Update German translation

Patch Set 1:    * add missing strings
                  - Calculate checksum
                  - Word wrap
                  - Display Hexdump
                  - Editor syntax highlighting

Patch Set 2:    * rename strings after comments

Patch Set 3:    * Hexdump without ""

Patch Set 4:    * fix some typos

Change-Id: Icd24c5c35a1f2618bcf7ca0b56b7b6abb3dd6192