Feature request: List relationships by name instead by relationship Id in toolbar drop-down

[phidrho]

Hi,

I have many relationships in my project and I always leave QGIS to define ID name (it's generated automatically).
Because of that some of IDs are very similar to each other, they differ only by number at the end.

Can you add an option to list relationships by name (user defined name) instead of by ID in drop down menu on toolbar?

Note: Relationship "name" can be an empty string so it should fallback to "by ID" if it's not defined.