IPKISS

	Selectize.define( 'empty_option', function ( options ) {
		var self = this;

		self.setup = (function () {
			var original = self.setup;
			return function () {
				original.apply( this, arguments );
				this.$dropdown.prepend('<div data-value="" data-selectable="false" class="option null"></div>');
				this.$dropdown.on( 'mousedown', '.null', function ( e ) {
					self.setValue( '' );