Update conflist on mute

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4445 43c1dc8c-776e-4df2-8ef1-6e829299be21
Start numbering participant starting at 1 in every new conference

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4446 43c1dc8c-776e-4df2-8ef1-6e829299be21
Added EndConf Button to conflist menu

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4447 43c1dc8c-776e-4df2-8ef1-6e829299be21