Instead of attempting to keep all the Fit service functionality, move these into specific "Fitting Commands" that are designed to define a unit of work and it's undo. Then, we will have "GUI Commands" which are defined as actions taken by the user themselves - these will usually use one or more "Fitting Commands".
Added the ability to remove charges and projected items using the
itemRemove built in context menu.
In this commit I fixed a minor bug in the projected view that caused the
right clicked item not to be SHOWN as selected until after the context
menu had been spawned and closed.
I also removed all parent references from the ContextMenu class and sub
classes. I am instead using the fit service to do all the work of
removing the items in the itemRemove class.
