ENIGMA2: bouquet bugfixes + implicit toggle for mute command

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4452 2b470e98-0d58-463d-a4d8-8e2adae1ed80
ONKYO_AVR: implicit toggle for mute command + improved errorhandling

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4453 2b470e98-0d58-463d-a4d8-8e2adae1ed80