Add Event Sources:event_sources

- Add source property in Action and EventFilter
- Change TPropContainer contructor to accept keyword arguments and set
  properties that were given
- Change every single TPropContainer subclass constructor to accept
  kwargs and pass them on to super init
- Add a "null" option for TStringProperty
Use Event Sources:
- Make the probe require a source property to install or subscribe
- Have ProbeProxy install and subscribe return a prefixed address
- Make update, uninstall and unsubsribe extract the prefix from the
  address
- Have the TutorialRunner set a source on actions/events before
  installing/subscribing instead of setting current activity on
  ProbeManager
Test Event Sources:
- Change the tests according to the new constructors and behaviors

1 files changed, 2 insertions, 2 deletions

diff --git a/addons/widgetidentifyaction.py b/addons/widgetidentifyaction.py
index c44964b..b59c94a 100644
--- a/addons/widgetidentifyaction.py
+++ b/addons/widgetidentifyaction.py
@@ -19,8 +19,8 @@ from ..actions import *
 from ..editor import WidgetIdentifier
 
 class WidgetIdentifyAction(Action):
-    def __init__(self):
-        Action.__init__(self)
+    def __init__(self, **kwargs):
+        super(WidgetIdentifyAction, self).__init__(**kwargs)
         self.activity = None
         self._dialog = None