Fixed SortedSet::remove() to return the removed element

modules/juce_core/containers/juce_SortedSet.h

@@ -376,7 +376,7 @@ public:
     */
     ElementType remove (const int indexToRemove) noexcept
     {
-        return data.remove (indexToRemove);
+        return data.removeAndReturn (indexToRemove);
     }
 
     /** Removes an item from the set.