fhem.svg.demo: change WEBphone iconPath to SVG


git-svn-id: svn://svn.code.sf.net/p/fhem/code@5092 2b470e98-0d58-463d-a4d8-8e2adae1ed80
THZ: bugfix, undefFn improved

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5093 2b470e98-0d58-463d-a4d8-8e2adae1ed80