Publicize: Social media accounts connections missing for other user roles (Editor and Author)

[fstath]

Steps to reproduce the issue

1. Add a user to a Jetpack site as an Editor.
2. Creates a WordPress.com account in order to manage the Publicize connections.
3. Visit the Connections tab under Marketing and it is blank.

What I expected

For the user (set as Editor) to be able to see the Connections page and connect their social accounts.

What happened instead

I am presented with a blank screen.

Screenshots

The Administrator can see the Connections page and manage their social media accounts.

[stale]

This issue has been marked as stale and will be closed in seven days. This happened because:

• It has been inactive in the past 9 months.
• It isn't a project or a milestone, and hasn’t been labeled `[Pri] Blocker`, `[Pri] High`, `[Status] Keep Open`, or `OSS Citizen`.

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