Adding drop shadow to main block.
Adding drop shadow to main block.

Fixes #416.

Jenselme/ngeo,adube/ngeo,adube/ngeo,Jenselme/ngeo,camptocamp/ngeo,pgiraud/ngeo,kalbermattenm/ngeo,camptocamp/ngeo,ger-benjamin/ngeo,kalbermattenm/ngeo,ger-benjamin/ngeo,camptocamp/ngeo,pgiraud/ngeo,Jenselme/ngeo,ger-benjamin/ngeo,pgiraud/ngeo,camptocamp/ngeo,adube/ngeo,Jenselme/ngeo,camptocamp/ngeo,adube/ngeo,kalbermattenm/ngeo