Embrace "The Vim Way" and bring back the "Undo motion"

I have the "Repeat motion" still available (usually thats ;, but I have
it as remapped as :). Now bring back its friend in the <Leader><Leader>
form.
Use the gruvbox theme on the GUI Vim
Don't let thematic spawn the window to its fullest.

Use 120 columns, which are enough for NERDTree, Gundo, etc. and text
around 80 chars. On the other hand, if I don't follow the 79 char rule
for that piece of code, 120 chars are a good measurement for a long
line.