improve responsiveness for tablets
popover refactoring
common function to initialize data in event popover
Merge pull request #25 from poupotte/refactoring/popover

Refactoring/popover
improve list resposiveness
Merge branch 'master' of github.com:mycozycloud/cozy-agenda
Merge branch 'refactoring/popover' of github.com:mycozycloud/cozy-agenda
make list fully responsive, simplify design and clean some code
debug alarm list
debug alarm list
improve alarm list ux
allow only event creation in the calendar view
better display of the popover
improve calendar responsiveness + bell icon for alarm section
debug force width for small devices