Enhancment - undo

- Now presents a side-by-side table for comparison during undo.

src/util.cpp

@@ -529,3 +529,16 @@ std::string taskDifferences (const Task& before, const Task& after)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+std::string renderAttribute (const std::string& name, const std::string& value)
+{
+  Att a;
+  if (a.type (name) == "date")
+  {
+    Date d ((time_t)::atoi (value.c_str ()));
+    return d.toString (context.config.get ("dateformat", "m/d/Y"));
+  }
+
+  return value;
+}
+
+////////////////////////////////////////////////////////////////////////////////