55_GDS.pm - modified: minor code improvements

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6086 2b470e98-0d58-463d-a4d8-8e2adae1ed80
bug in presending secondary register

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6087 2b470e98-0d58-463d-a4d8-8e2adae1ed80
(re?)added missing fhemweb_readingsHistory.js


git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6088 2b470e98-0d58-463d-a4d8-8e2adae1ed80
use rgb part if color has more than 3 components


git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6089 2b470e98-0d58-463d-a4d8-8e2adae1ed80