Closes the autocomplete dropdown menu.
function() {
		var self = this;
		var trigger = self.isOpen;

		if (self.settings.mode === 'single' && self.items.length) {
			self.hideInput();

			// Do not trigger blur while inside a blur event,
			// this fixes some weird tabbing behavior in FF and IE.
			// See #1164
			if (!self.isBlurring) {
				self.$control_input.blur(); // close keyboard on iOS
			}
		}

		self.isOpen = false;
		self.$dropdown.hide();
		self.setActiveOption(null);
		self.refreshState();

		if (trigger) self.trigger('dropdown_close', self.$dropdown);
	}