Remove jQuery

[Andries-Smit]

This widget does nicely do what is needed. However it loads jquery
https://github.com/mendix/InputReferenceSelector/blob/master/src/refkit/widget/InputRefSelector.js#L24

Looking at the use, it does make no sens to use it

$("div#" + this.id).focusin(function() {
	$(this).addClass("MxClient_Focus");
	$(this).css("outline", "#333 auto 2px");
	if ($("div#" + self.id + " div").hasClass("dijitTextBoxFocused")) {
		$("div#" + self.id + " div").css("outline", "rgb(0, 0, 0) auto 0px");
	}
});

$("div#" + this.id).focusout(function() {
	$(this).removeClass("MxClient_Focus");
	$(this).css("outline", "transparent auto 0px");
});

Could this be removed?