Add italic display for pointer function parameters

For some time now we have the accentuation for non-const reference parameters, i.e.:

void test(int &i)
{
  ++i;
}

int main()
{
  int i = 42;
  test(i); // <-- i is displayed italic here
} 

It could be useful to extend this to non-const pointers too, i.e.

void test(int *i)
{
 ++(*i);
}

int main()
{
 int i = 42;
 test(&i); // <-- i could be displayed italic here
}

The reason is, that you can easily spot potential variable changes from within the function at caller side.