Fixing bugs according to CPC 1.7 rc5. Refs: #26.
Minor wording corrections.
TextCmds.PasteViewGuard changed to StdCmds.PasteViewGuard in System/Docu/User-Man
as proposed by Doug.
Some changes of CPC 1.7 change list number 2 refer to other issues which are treated separately.
So they are not included here.

Signed-off-by: Josef Templ <josef.templ@gmail.com>