🚀 Feature: Add description field to reverse share

[fsedarkalex]

🔖 Feature description

I would find it valuable to have a short description field on reverse share creation. The text entered should also be shown in the tables.

🎤 Pitch

I want this field, so that I can add a hint for whon or what I created this reverse share invitation.
In my case I am using pingvin for support tickets, and I find it hard to keep track of which share belongs to which ticket.