Delete option occuring in every container in issue#125

What does this PR do? This PR is a solution to the problem specified in issue #125 The problem was when we click on dot elements on a particular link container and again when we click on dot elements on another link container we see that the delete option of first container should hide but its not hiding.
Any background context you want to provide? So,I developed a solution for that problem in which clicking the dropdown of one container will hide the previous one. So,Delete option will only be for the link container which was clicked latest. I have attached a live demo for it.
Screenshots and/or Live Demo

prateek3255 / scrroll-in