INTEG-263 [Unified Search] Can not show result if keyword contains character * at begin

Fix description:
- Escape keyword in quick search portlet
INTEG-292: [integ-wiki] HTML encoding of wiki page's content when like a wiki activity

Fix description:
* Problem: Side effet from INTEG-89
* Fix: Remove the fix of INTEG-89 & resolve the problem occurs on INTEG-89
INTEG-298: Possible to comment on topic activity although topic or its forum is locked/closed

Fix description:
- Modify method: getTopic() in ForumUIActivity.java because the topic had been get from DataStorage not from ForumService. So it doesn't use eXoCache => Raise problem about performance.
- Add new boolean function to check if forum/topic in status Lock or Close.
INTEG-295: Unified Search failed when Platform runs inside an IFrame

Fix description
- Correct the way to get portal name by local javascript object
INTEG-268 [Unified Search] Answer icon is too small in Floating Suggestion

Fix description: update answer icon.