Add new shortcuts for left and right sorting of 3/4 width.

[destogl]

After adding 1/4 full height ordering of windows in #22, I realized that I am often ordering one window at 1/4 (e.g., Webbrower) and my IDE on 3/4 of the width on my 49'' screen. Here I am adding shortcuts for this to reduce amout of manual window resizing. (It's simple with KDE but annoying :D ).

Hope that other people may find this useful!

Changes:

• Add new shortcuts for left and right sorting of 3/4 widht.
• Remove space at the end of the string.