As a part of this add the Rotatable layout modifier that can rotate the
windows 90 degrees using Shift+Mod+r.

dynamicLogWithPP does not support Unicode properly!! It was encoding
each "Char" (32 bits in Haskell, mind you!) to a utf-8 byte instead of a
codepoint. The result was a butchared faux-utf8 encoded string.

This was causing xmobar to crash with unicode + my truncating code. I
have now moved away from dynamicLogWithPP and am writing my own log
string manually. It's better this way anyway; less hacky; more
fine-grained control.

It wasn't working as expected for flips. This is because the
avoidStructs layout modifier was too low in the layout stack.