[Feature] Drag and Drop link to edit existing link

[ashwin-pc]

Summary

currently you can only add a new link by dragging a new link onto the page. This chage would allow you to drag a link onto an existing link and update it. This is useful for constantly updating links Or even if you just had the wrong link in the first place.

Approach

Instead of having a global drop target that just lets you add a link to the page, each of the links, including the add new link button enable when you drag a link over into the app. This lets you adda link into a specific category or even the featured section without any additional effort.