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

Change-Id: Ia0a8443c6989d7938e479a88e3899fb611106544
work on existing comments

- (un)doxygenize
- move to right position
- /** */ => /// if only one line

Change-Id: I786953b7f6c83d384b0685c7dc2e5f98d4152b50
fdo#62475 - remove visual noise

Change-Id: I36e970c2ed13c50e5f6cebf95aa36ca8194a01ce
deleted code that was commented out in sw/source/core/layout/

Change-Id: Id1acb0ef8a668c61cdfd852040f44023b37bda37