Add make_status_renderer() to MasterView

batches aren't the only table/view where a status code/text combo may
be in use

tailbone/views/master.py

@@ -953,6 +953,24 @@ class MasterView(View):
 
         return email_key
 
+    def make_status_renderer(self, enum):
+        """
+        Creates and returns a function for use with rendering a
+        "status combo" field(s) for a record.  Assumes the record has
+        both ``status_code`` and ``status_text`` fields, as batches
+        do.  Renders the simple status code text, and if custom status
+        text is present, it is rendered as a tooltip.
+        """
+        def render_status(obj, field):
+            value = obj.status_code
+            if value is None:
+                return ""
+            status_code_text = enum.get(value, six.text_type(value))
+            if obj.status_text:
+                return HTML.tag('span', title=obj.status_text, c=status_code_text)
+            return status_code_text
+        return render_status
+
     def before_create_flush(self, obj, form):
         pass