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`.
Starting with 5240116f3cdf169e3aa226d9f8206a5f5b99c867 we only support
GHC versions 8.4.4 and up (more precisely, the GHC version associated
with stackage lts-12 and up). The imports in question are now in
Prelude and need not be imported explicitly.
Despite myLayouts currently being more popular in examples, make
them all myLayout as in man/xmonad.hs to avoid mixing them in the
same module as was done a few places, leading to confusion for some users.
The order previously was not as documented, which prevented resizing specific
windows.
The Mosaic constructor is hidden in favour of mosaic :: Rational -> [Rational] -> Mosaic a
Expand and Shrink messages are added, requiring another argument.
Remove useless demonstration of SlopeMod message since resizing the focused
window is better.
The position of a window in the stack determines its position and layout. And
the overall tendency to make wide or tall windows can be changed, though not
all of the options presented by MosaicAlt can be reached, the layout changes
with each aspect ratio message.
