Create icon view for sites administration portlet

• Type: Technical Task
• Status: Closed
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.0.0 Beta 5
• Component/s: Sites Administration
• Labels: None
• Git Pull Request: https://github.com/ealonso/liferay-portal/pull/615

Create icon view for sites administration portlet, move logic from JSP to display context.