Set VISUAL env variable to vi
Format tmux status line a bit more

Now showing the hostname and sessionname followed by window ids and
names
Change check for relativenumber

The check for relativenumber now not only checks if relativenumber
exists but also if it works
Remove fugitive from statusline

Needs more checking so removing it for now
Disable arrow keys in command mode

Might regret this but disabled arrow keys pretty much completely now