Re-adding localized menu labels for effects

If you can believe it, this whole big mess is
just to get localized effect labels back into
the menus.

I sure wish I'd had a little bit more time to
finish up all of the effects.  It sure would 
be a lot cleaner (code wise).

src/effects/Echo.h

@@ -31,7 +31,7 @@ class EffectEcho:public Effect {
    EffectEcho();
 
    virtual wxString GetEffectName() {
-      return wxString(_("Echo..."));
+      return wxString(wxTRANSLATE("Echo..."));
    }
 
    virtual std::set<wxString> GetEffectCategories() {