Duplicate choise of "default SR" to pool settings

[TristisOris]

Is your feature request related to a problem? Please describe.
Very hard to find it first time, also hard to remember how to do it. I'm again wasted a few minutes for that.

Only way to set default SR - go to storage list and hit this small button.

Describe the solution you'd like
So why not add this option to advanced tab. It's already some similar options here.