The selection view now works. Functions can return a dataset.Selection object which will be stored in the selection list.

system/fluents.py

@@ -144,6 +144,9 @@ class FluentApp:
         self.identifier_list.show()
         return self.identifier_list
 
+    def __getitem__(self, key):
+        return self.widget_tree.get_widget(key)
+
     # Event handlers.
     # These methods are called by the gtk framework in response to events and
     # should not be called directly.
@@ -154,9 +157,6 @@ class FluentApp:
     def on_multiple_view(self, *ignored):
         self['main_view'].goto_small()
 
-    def __getitem__(self, key):
-        return self.widget_tree.get_widget(key)
-
     def on_create_project(self, *rest):
         d = dialogs.CreateProjectDruid(self)
         d.run()