Don't include margins when calculating the menu dimensions
Don't include margins when calculating the menu dimensions

We set a negative left margin on the menu to center it, so including
the menus in the dimensions causes it to shift to the left.

unicef/polio,SeedScientific/polio,unicef/rhizome,unicef/rhizome,unicef/polio,unicef/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,unicef/rhizome