Initial hookup of the new positioning into MT. The corner effects work,

Initial hookup of the new positioning into MT. The corner effects work,
except for pivot on the right side. There is no error checking to make
sure that the effect and the position are a valid combo, so you can make
some interesting things happen still. Have to add sanity checking in
PreferencesController still. Look at EffectsSupport.txt in ITKit to see
what is allowed where.