Enable folding for C.
Remove vim search regex mode.

More trouble than it's worth.
Remove arrow keys binds. Never used them.
Cosmetic changes in i3 config.
Add a launch mode to start apps.

I can't believe I've been typing `<super>+dfire<tab><enter>` for years when a
simple `<super>+<tab>f` would have been enough.
Remove the Return key from modes.
Use Inconsolata for i3 titles and i3status.

I had to remove the fancy unicode char in i3status because it ruined the line
vertical alignment.