Improved the alert to user interface, and added an enum class for severity flags.

nw/enum.py

@@ -67,3 +67,12 @@ class nwDocAction(Enum):
     SEL_PARA  = 12
 
 # END Enum nwDocAction
+
+class nwAlert(Enum):
+
+    INFO  = 0
+    WARN  = 1
+    ERROR = 2
+    BUG   = 3
+
+# END Enum nwAlert