Don't use NSAccessibilityUnignoredChildren.

The function is massively ineffective on deep hierarchies
and not strictly needed. (It's supposed to filter out
"Ignored" children - VoiceOver will do that anyway based
on accessibilityIsIgnored())

Change-Id: I9a74b5f5e9b7880e0d46d5330f7192472eac7a36
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm

@@ -139,7 +139,7 @@ static QAccessibleInterface *acast(void *ptr)
             [kids addObject:[QCocoaAccessibleElement elementWithInterface:(void*)childInterface parent:self]];
         }
 
-        return NSAccessibilityUnignoredChildren(kids);
+        return kids;
     } else if ([attribute isEqualToString:NSAccessibilityFocusedAttribute]) {
         // Just check if the app thinks we're focused.
         id focusedElement = [NSApp accessibilityAttributeValue:NSAccessibilityFocusedUIElementAttribute];

src/plugins/platforms/cocoa/qnsviewaccessibility.mm

@@ -80,7 +80,7 @@
             [kids addObject:[QCocoaAccessibleElement elementWithInterface: m_accessibleRoot->child(i) parent:self ]];
         }
 
-        return NSAccessibilityUnignoredChildren(kids);
+        return kids;
     } else {
         return [super accessibilityAttributeValue:attribute];
     }