Font Family Collision Bug Fix

this selector causes font-family:FontAwesome which we don't want. Might
need to come up with a better fix if ExtJS uses classes with icon in
the name elsewhere

x-tree-node-el x-tree-node-leaf x-unselectable icon-document
x-tree-node-leaf icon-resource psave pview pedit pduplicate pnew
pnew_modDocument pnew pnew_modSymLink pnew pnew_modWebLink pnew
pnew_modStaticResource pqcreate pqupdate pdelete pundelete ppublish
punpublish