Aliases in GUI builder for multi-join fields to minimize confusion when selecting field for aggregation

[FilmonK]

Is your feature request related to a problem? Please describe.
We have a customer that would like to be able to see aliases or some kind of identifier when joining to the same table multiple times in GUI builder. In the example they provided, they’re connecting on different fields.

Describe the solution you'd like
An identifier or alias of some sort within the GUI builder to mitigate confusion.

How important is this feature to you?
They have end-users that would like to minimize confusion when queries are more complicated than the example I provided.