Adrien Di Mascio <Adrien.DiMascio@logilab.fr> [Wed, 01 Aug 2012 09:20:47 +0200] rev 8504
[ajax] improve backward compatibility for redefined ajax functions (closes #2447189)
If an ajax function from stdlib (e.g. js_reledit_form) was redefined in a cube,
the cube version should still takes the precedence<
=> check for existing ajax function on deprecated controller _before_ checking
ajax function availability on the new one.