Fix Target URL when absolute URL is set without `http*`
If a user specifies a link without www.*** (for example: google.com), clicking on it on the notification's view will lead to a non-existing page since we href
interprets it as a relative URL by default (it needs http** or www.**). We need to conditionally concatenate //
before if it's not a URL https://stackoverflow.com/questions/5717093/check-if-a-javascript-string-is-a-url