Two small import bugs

Author: rocky

mathics/builtin/colors/color_directives.py

@@ -15,9 +15,11 @@
 from mathics.builtin.drawing.graphics_internals import _GraphicsElement, get_class
 from mathics.core.expression import (
     Expression,
+    Integer,
     Real,
     String,
     Symbol,
+    SymbolList,
     from_python,
 )