When checking bug #4959, some other bugs has been detected :
- switching language on publication was broken
- URL of images into WYSIWYG editor were not correct
fixing lost of translations on spaces and components relative to bug #4959

Conflicts:
	lib-core/src/main/java/com/stratelia/webactiv/beans/admin/ComponentInst.java
	lib-core/src/main/java/com/stratelia/webactiv/beans/admin/ComponentInstManager.java
	lib-core/src/main/java/com/stratelia/webactiv/beans/admin/SpaceInst.java