fixing the :after arrow in the dropdown when the option name is too long...

... and there is another dropdown in it.

To reproduce the bug...

1. Go to http://ink.sapo.pt/navigation#nav-dropdowns
2. Click the dropdown there
3. Look at the arrow in the "a longer option name" option.

To fix it, just remove float:right from the a:after (the arrow) in your inspector.

@gnpfonseca could you look into this?

kthx