Link Custom Item with another Item

Custom items can be linked together. The user interface for it is very similar as []linking Custom Item with a Contact](https://github.com/mautic-inc/plugin-custom-objects/wiki/Link-Contact-with-an-Item#1-manually-via-ui).

Let's imagine we have a Custom Item called Bread and we want to link it with related products. For example with Toaster. We created Custom Object called Products where the Toaster custom item belong to. When we open the Bread Custom Item we will see the Products tab:

To link another Product, search for it:

When you select the right Custom Item you searched for then it will show up in the table of linked Custom Items. If you want to unlink it, there is a button for it in the context menu of the table row.