Fix a bunch of bugs

sugar/browser/browser.py

@@ -163,10 +163,9 @@ class BrowserActivity(activity.Activity):
 		self.uri = uri
 		self._group = group
 		
-		self._setup_shared(uri)		
-
 	def _setup_shared(self, uri):
 		self._model = self._group.get_store().get_model(uri)
+		if self._model:
 			self._load_shared_address()
 			self._model.add_listener(self.__shared_address_changed_cb)
 	
@@ -196,6 +195,8 @@ class BrowserActivity(activity.Activity):
 
 		vbox.show()
 		
+		self._setup_shared(uri)
+	
 	def get_embed(self):
 		return self.embed
 	
@@ -218,7 +219,7 @@ class BrowserActivity(activity.Activity):
 
 	def _load_shared_address(self):
 		address = self._model.get_value("current_address")
-		if (address != self.embed.get_address()):
+		if address != self.embed.get_address():
 			self.embed.load_address(address)
 		
 	def __shared_address_changed_cb(self, model, key):

sugar/p2p/Group.py

@@ -2,7 +2,7 @@ from Buddy import Buddy
 from Buddy import Owner
 from Buddy import PRESENCE_SERVICE_TYPE
 from Service import Service
-import Model
+from sugar.p2p.model.Store import Store
 import presence
 
 class Group:
@@ -15,7 +15,7 @@ class Group:
 	def __init__(self):
 		self._service_listeners = []
 		self._presence_listeners = []
-		self._store = Model.Store(self)
+		self._store = Store(self)
 	
 	def get_store(self):
 		return self._store

sugar/p2p/model/LocalModel.py

@@ -2,7 +2,7 @@ import socket
 
 from sugar.p2p.Service import Service
 from sugar.p2p.model.AbstractModel import AbstractModel
-import network
+from sugar.p2p import network
 
 class ModelRequestHandler(object):
 	def __init__(self, model):
@@ -25,7 +25,6 @@ class LocalModel(AbstractModel):
 		self._values = {}
 		
 		self._setup_service()
-		self._setup_notification()
 	
 	def get_value(self, key):
 		return self._values[key]