In nodes list view include last post information as in mockup

• Type: Technical Task
• Status: Closed
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: Collaboration, Wiki
• Labels: None
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/40786

When viewing the list of wiki nodes we only present the name of the node and the number of pages in that node, but we should also include the Last Post Date as shown in the mockups attached to the Story in the PDF file.

The information about the lastPostDate can be directly obtained from the WikiNode model doing:

wikiNode.getLastPostDate()