Change default terminal in Qtile

The default configuration includes the shortcut Super+Enter to open a new terminal (selected from a hardcoded list)

test_terminals += [
	"roxterm",
	"sakura",
	"hyper",
	"alacritty",
	"terminator",
	"termite",
	"gnome-terminal",
	"konsole",
	"xfce4-terminal",
	"lxterminal",
	"mate-terminal",
	"kitty",
	"yakuake",
	"tilda",
	"guake",
	"eterm",
	"st",
	"urxvt",
	"xterm",
	"x-terminal-emulator",
	]

$ sudo update-alternatives --config x-terminal-emulator

$ sudo mv /usr/bin/xterm /usr/bin/xterm.bak