Merge pull request #207 from ngodfraind/master

Minor fixes.
User managment GUI update
Merge remote-tracking branch 'upstream/master'
Tabs margins
Merge pull request #208 from solispauwels/master

User managment GUI update
Messages GUI update
Merge pull request #209 from solispauwels/master

Messages GUI update
change date format
Merge pull request #210 from easy-es/agenda

change date format