WIKI-642 : Javascript error when switching page with accent characters to Rich Text Mode

Fix description:
- fix js bug: $ is consider as jQuery, but it should be prototype object in prototype.js
- revert wrong comment in UIWikiWysiwygLoader.js
WIKI-592: Wrong position of section editing's tooltip

Description: Change the data-placement property from bottom to left to fix the tooltip display only on 1 line.
WIKI-636: Some problems with wiki porlet in public mode after WIKI-601