LPS-45348 If nodeName parameter is present we should obtain the node based on that parameter. That parameter is set in FindPageAction to indicate the wiki page that should be render. As WIKI_DISPLAY is included as one of the possible targets of the FindPageAction we should read the parameter that FindPageAction sets in the url.
LPS-45348 Create getNode() protected method to abstract the logic
LPS-45348 Simplify