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.
This patch will swap the positions of the two slave windows and this will result in a more intuitive window order. When using focusDown beginning in the master pane we will move in the following graphical order 2->3->1->2->3 instead of 2->1->3->2->1. This is backwards from what is expected.
The small drawback is that increasing from 2 to 3 windows (and therefore also columns) will behave in a less intuitive way. The window in the right column will jump to the left of the screen.
I think that it is a good idea to make this change since I rely a lot on the window order but people using WindowNavigation may be of a different opinion.
An alternative is to add an option to select in what way to behave, but that could be overkill... I leave it up to discussion and devs to decide.
