Improve UI in sites drop down when user does not have add sites permission.

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 3.X EE, 3.X CE, 3.1 EE, 3.1.0 CE
• Component/s: Social Office User Bar (Dockbar), Social Office User Bar (Dockbar) > Sites Directory
• Labels: None

See images on parent story ticket. Currently when permission to add site is removed, there is a single button at 50% width, which looks quite odd.