Better fix for the vibrate on iOS issue

This keeps the vibrate on Android devices

src/client/js/misc/helpers.js

@@ -133,5 +133,9 @@ define([], function () {
 	window.scale = isMobile ? 32 : 40;
 	window.scaleMult = isMobile ? 4 : 5;
 
+	if (!window.navigator.vibrate) {
+		window.navigator.vibrate = () => {};
+	}	
+
 	return window._;
 });

src/client/ui/templates/messages/mobile.js

@@ -64,6 +64,8 @@ define([
 		},
 
 		clickKey: function (key) {
+			window.navigator.vibrate(20);
+
 			let elInput = this.find('input');
 
 			const handler = {