InfinteGrid show x-boxs when Image is failed

[sculove]

Description

• infiniteGrid should support failover feature when image loading is failed. (error code 404)
• infiniteGrid should notify that the image loading is failed.

Interface

new eg.InfiniteGrid("#grid", {
    itemSelector: ".item"
}).on({
    "imageError": function(e) {
        // e.target: image element. - replace image element or src
        // e.item: item element. - If the item was previously deleted, this value is undefined.
    },
});