WIKI-793: Wrong behavior when creating page without title

Problem analysis:
* This is a side effect from WIKI-523. Autosaving is enabled before opening the confirmation pop-up

Fix description:
* Disable the autosaving before rendering the confirmation pop-up
WIKI-853: [Cloud] No content in Wiki syntax help (Edit source mode)

Analysis:
* Only the first tenant that accesses Wiki can have wiki syntax help panel.
* Once the Syntax Help panel displays, the help content is stored in DB. It no longer depends on "first tenant access" context.
* WikiServiceImpl uses an Iterator object to generate help page for wiki.
  This Iterator object will be empty from the second time (because the last element was already accessed)

Fix description
* Improve WikiServiceImpl to support multi-tenancy by itself
* Use List type instead of Iterator
WIKI-834: Loading forever of Tree navigation when wiki page is made public

Fix description:
* Make getTreeData REST service available for public.
WIKI-832: Page not found when open a wiki page from activity stream after quick edit its title

Fix description: set URL for page after renaming its title inline
WIKI-519 Broken PageContentArea after unfolding a page from pagetree macro

Fix description: Re-calculate the height of page area after first time unfolding page
WIKI-830: Alert message is posted when adding Wiki portlet to a site

Problem:
- This is a side effect from WIKI-380

Fix description:
- Remove useless script block in UIWikiPortlet.gtmpl
- Add a condition to get the function fixLinksTargetAttribute in UIWikiContentDisplay.gtmpl
WIKI-489: Escape single quote in Confirmation Messages