fixing bug #4299
current language is used to display attached files (i18n use case only)
fixing bug #3670 by catching appropriate exception
fixing bug #4312 by preventing NullPointerException
Fixing bug #3957
Now, the only way to validate a publication is to use the explicit action 'Validate'
On publications to validate, an explicit area have been added to publication.jsp and clone.jsp
Popup window to enter refusal motive have been replaced by jQuery Dialog
Now, clone.jsp is following look and feel of publication.jsp

Conflicts:
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_de.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_en.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_fr.properties