Avoid "Switch" type arguments to modifiers

[harendra-kumar]

We have option modifiers like this:

force :: Switch -> Mv -> Mv

The idea to use a Switch type was that we can use force On or force Off at any point when we are composing the modifiers. So if we have a bundle of options which have turned force On then we can use force Off on it to clear that flag. This may not be very useful when there are few modifiers for a command. We can consider using a more terse force :: Mv -> Mv that will just enable force on the default options.

This issue is for consideration/discussion, not for immediate implementation.