Version 4.0

git-svn-id: https://plugins.svn.wordpress.org/qr-code-waiter-calling-system/trunk@990093 b8457f37-d9ea-0310-8a92-e5e31aec5664
formatted with WordPress rules

git-svn-id: https://plugins.svn.wordpress.org/qr-code-waiter-calling-system/trunk@990094 b8457f37-d9ea-0310-8a92-e5e31aec5664
formatted with WordPress rules

git-svn-id: https://plugins.svn.wordpress.org/qr-code-waiter-calling-system/trunk@990096 b8457f37-d9ea-0310-8a92-e5e31aec5664