bug #4719 :  Fix some XSS flaws. The aim is to encode for HTML inputs coming from a user at rendering time.

Conflicts:

	kmelia/kmelia-war/src/main/webapp/kmelia/jsp/javaScript/navigation.js
	quickinfo/quickinfo-war/src/main/java/com/stratelia/webactiv/quickinfo/control/QuickInfoSessionController.java
on bug #4719 fixes, empty fields could be displayed with "null" value