Limit property set name/description length

### What does it do ?

Limit the property set name & description fields to their respective DB column limits (50/255).
Additionally, the grid & tree should now resize properly (when resizing the browser/collapsing/expanding the left navigation)

### Why is it needed ?

Users have to feedback on the fields limits, so they could write more data than what would be saved.

### Related issue(s)/PR(s)

* #6953