Add shake to the modal when the user clicks on the overlay

Modal calls for the users attention when they click on the overlay, so to give a hint that they have to fill in the address form first.

[ ] Bug fix (a non-breaking change which fixes an issue)
[x] New feature (a non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)
[ ] Requires change to documentation, which has been updated accordingly.

vtex-apps / address-locator