`applications` plugin doesn't work with alacritty terminal

[liferooter]

applications plugin doesn't work if config.terminal is set to Some("alacritty") because Alacritty expects command line passed with -e to be separate arguments, not one.

[seangenabe]

Related to #91 probably?

[Kirottu]

This should now be fixed with a new way of configuring the terminal as seen in the Applications plugin README.