Fixes a date field margin error
Fixes a date field margin error

This fixes a visual bug with the default datepicker where the three selects are not aligned properly. I don't think this intervenes or breaks other parts of the app, however correct me if I'm wrong.

Cheers.


![Screenshot](http://i.imgur.com/RK2IQz7.png)
OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,ogizanagi/EasyAdminBundle,javiereguiluz/EasyAdminBundle,ogizanagi/EasyAdminBundle,yceruto/EasyAdminBundle,yceruto/EasyAdminBundle,ogizanagi/EasyAdminBundle,javiereguiluz/EasyAdminBundle,yceruto/EasyAdminBundle,ogizanagi/EasyAdminBundle