Generate a modal dialog that displays a URL
The modal dialog generated by urlModal will display the URL in a textarea input, and the URL text will be selected so that it can be easily copied. The result from urlModal should be passed to the showModal() function to display it in the browser.
urlModal(url, title = "Bookmarked application link", subtitle = NULL)
url: A URL to display in the dialog box.title: A title for the dialog box.subtitle: Text to display underneath URL.Useful links