fdo#39468: Translate German comments in sw/source/core/

Change-Id: Ib48b281feccd4684571768ca2be6ecca23afbf55
normalize comments

Change-Id: I13986c75d28d01f6afa193ea963b23f8dba703e8
fix existing comments

Change-Id: I718576c05ee3c621f2544cb1dcd6f0d7d1cc87c9
remove code that was commented out more than three years ago

Change-Id: I8bc53b5d940be73d8b4142a72fb247c4e3af2e17
fix merge peculiarities

Change-Id: I8f01f16c52624611ac19dbd040ba0389ceccece2