Make sure that filters are not confused by ANSI color codes.

This is done by applying the colors as the last step, so the preceding
filters don't have to worry about it.

topydo/lib/View.py

@@ -58,12 +58,16 @@ class View(object):
 
         # since we're using filters, always use PrettyPrinter
         printer = PrettyPrinter()
+
         printer.add_filter(PrettyPrinterNumbers(self._todolist))
-        printer.add_filter(PrettyPrinterColorFilter())
 
         for ppf in p_pp_filters:
             printer.add_filter(ppf)
 
+        # apply colors at the last step, the ANSI codes may confuse the
+        # preceding filters.
+        printer.add_filter(PrettyPrinterColorFilter())
+
         return printer.print_list(self._viewdata)
 
     def __str__(self):