Publisher: In create mode hide selection of Subsets

[BigRoy]

Is your feature request related to a problem? Please describe.

When on the Create Page you still see the active selection in Subsets to publish on the right

However, that makes it somewhat feel like that right hand side has something to do with the values I'm seeing to the left of it. But they aren't. I almost think that right hand side subsets to publish should be deactivated completely and just be visual reference of what you already have.

(The same goes for the + button on the right hand side underneath those Subset to Publish - it doesn't do anything in the Create page)

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Also, selecting no asset/task on the left hand side still allows you to create an instance - which seems to be a bit confusing too.

Describe the solution you'd like

The create page to me still confuses me most of the time. So anything that tries to avoid clutter and confusion on the page will help.

Describe alternatives you've considered

It might be even worth deciding to NOT show the subset to publish at all. It's nice seeing what's already there currently but I feel like in the current state it's more confusing and clutter than what it adds to the end user.

[cuID:OP-4745]