Only apply solarized colors to urxvt

Solarized colors from here: https://github.com/solarized/xresources

Also: style Qt apps (like vlc), like Gtk+ apps
Update webapps list
Fix terminal settings' application

Goes with 306d03019e9a847e27471e74ff59e6ca8f6dcc61
Add mutt config

Thanks @sigmavirus24 for the help with this!