Add tasks to the home window. A bunch of fixes.

sugar/activity/Activity.py

@@ -179,7 +179,7 @@ class Activity(gtk.Window):
 
 		self.connect('realize', self.__realize)
 		
-		self.show()
+		self.present()
 	
 	def __realize(self, window):
 		if not self._dbus_service:

sugar/keybindings.py

@@ -13,6 +13,8 @@ def setup_global_keys(window, shell = None):
 	window.connect("key-press-event", __key_press_event_cb, shell)
 
 def __key_press_event_cb(window, event, shell):
+	if event.keyval == gtk.keysyms.F1:
+		shell.toggle_home()
 	if event.keyval == gtk.keysyms.F2:
 		shell.toggle_people()
 	if event.keyval == gtk.keysyms.F3: