Show variable type in element predefined variables sidebar tooltip

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Web Search > Search Admin
• Labels: None
• Epic Link: Editing Elements
• Git Pull Request: https://github.com/thektan/liferay-portal/pull/221

Only the template variable is shown, but the type should also be shown.

Tooltip should display

Type: String
Variable: ${user.user_first_name}

Edit: Included help text (localization key from blueprints-lang module)