Get correct path for glade file based on the path of the system package.

system/dialogs.py

@@ -7,7 +7,8 @@ import gobject
 from system import logger, project, workflow
 import workflows
 
-GLADEFILENAME = os.path.dirname(sys.argv[0]) + '/system/fluent.glade'
+DATADIR = os.path.dirname(sys.modules['system'].__file__)
+GLADEFILENAME = os.path.join(DATADIR, 'fluent.glade')
 
 class CreateProjectDruid(gtk.Window):
     """A druid for creating a new project.