Added support for deleting molecules
Added support for deleting molecules

Lame icon, will fix soon, experimenting with the layout of the view.

OpenChemistry/avogadroapp,OpenChemistry/avogadroapp,ghutchis/avogadroapp,OpenChemistry/avogadroapp,ghutchis/avogadroapp,wadejong/avogadroapp,ghutchis/avogadroapp,wadejong/avogadroapp,ghutchis/avogadroapp,OpenChemistry/avogadroapp,wadejong/avogadroapp