LPS-46272 Split WikiSettings into WikiSettings and WikiPortletInstanceSettings and move corresponding attributes from the former to the latter
LPS-46272 Split wiki configuration into wiki and wiki_admin configuration and move corresponding attributes from the former to the latter
LPS-46272 Adapt EditNodeAction to the split of WikiSettings
LPS-46272 Remove configuration variables from init.jsp and inline them in the JSPs that use them
LPS-46272 Support multivalued keys in wiki Settings
LPS-46272 Move some display logic to a WikiConfigurationDisplayContext class to remove configuration variables in init.jsp totally
LPS-46272 Adapt to changes in LPS-46267
LPS-46272 Remove unused properties from WikiSettings (reappeared after merge conflict)
LPS-46272 SF