The 'smartBorder' now depends on the window/rectangle list resulting
from 'runLayout' rather than the stack, which means that the child
layout will always be called with the screen border. If only a single
window is displayed, it will be expanded into the original layout
rectangle.
These layout have different applications but their names could cause some
confusion since the module names could just as well be swapped. To support this claim,
what we call "spacing" is named "gaps" in i3wm (i3-gaps). Therefore hyperlinks have
been added to inform the reader of the existence of the other module.
Layout.Spacing applies a customizable amount of space around the outside of each
window. At window edges where two windows meet, the total distance between them
is therefore twice the customized value (one space value from each window). At
the edge of the screen, however, the spacing is only applied once. This results
in uneven amounts of spacing and differently-sized gaps on the screen.
This patch extends the Spacing layout to include a further gap all around the
edge of the screen, thus making all spaces around windows equal in size.
