These modules were duplicating a substantial amount of low-level code.
`X.A.CycleWorkspaceByScreen` had already separated most of the
implementation details from the logic with `repeatableAction`; all that
was left was to generalise it a little further, put it in a suitable
place and express the other modules through it.
The documentation for this module was lacking, making it significantly
harder to use than the functionality wise very similar
X.A.CycleRecentWS—change that.
This is a convenience module in order to have less import noise. It
re-exports the following:
a) Commonly used modules in full (Data.Foldable, Data.Applicative, and
so on); though only those that play nicely with each other, so that
XMonad.Prelude can be imported unqualified without any problems.
This prevents things like `Prelude.(.)` and `Control.Category.(.)`
fighting with each other.
b) Helper functions that don't necessarily fit in any other module;
e.g., the often used abbreviation `fi = fromIntegral`.
