If no group label is provided, use group name. Fix #281
Merge branch 'master' of https://github.com/ajaxplorer/ajaxplorer-core
Make custom sort function to make sure users are sorted (fix #279)
Fix CLIENT_SESSION_TIMEOUT legend (infinite value is -1, not 0). Force value to -1 when session is AjaXplorer_Shared, should fix #272
Merge branch 'master' of https://github.com/ajaxplorer/ajaxplorer-core
Code style
Merge branch 'master' of https://github.com/ajaxplorer/ajaxplorer-core