Add pagination for the issues listed

[khaledkbadr]

Now, we get the issues with the default page size. We need to add pagination to list the issues whenever the user scrolls down to the current issues limit.

[khaledkbadr]

The pagination should be implemented with infinite scrolling on each stage column and get issues from that stage only. I believe it's the best way to implement this because normally we don't want useless data or requests and since users normally are interested in one stage more than the other.

[khaledkbadr]

Load more button was added on master to load more pages