Make it possible for the user to select which graphical sudo application to use.

Make any external apps not installed on the system unselectable in the GUI.
Rework the app selection code in the backend to fall back to auto-selection if a requested app isn't installed.
Tweak the autoconnect attempt throttle in wicd-monitor to not be as aggressive.
Made sure the preferences dialog would reconnect to dbus when a DaemonStarting signal was sent.

wicd/gui.py

@@ -37,6 +37,7 @@ from dbus import version as dbus_version
 from wicd import misc
 from wicd import wpath
 from wicd import dbusmanager
+from wicd import prefs
 from wicd.misc import noneToString
 from wicd.netentry import WiredNetworkEntry, WirelessNetworkEntry
 from wicd.prefs import PreferencesDialog
@@ -45,12 +46,6 @@ from wicd.guiutil import error, GreyLabel, LabelEntry, SmallLabel
 if __name__ == '__main__':
     wpath.chdir(__file__)
 
-try:
-    import pygtk
-    pygtk.require("2.0")
-except:
-    pass
-
 proxy_obj = daemon = wireless = wired = bus = None
 language = misc.get_language_list_gui()
 DBUS_AVAIL = False
@@ -71,6 +66,7 @@ def setup_dbus(force=True):
                 return False
         else:  
             return False
+    prefs.setup_dbus()
     bus = dbusmanager.get_bus()
     dbus_ifaces = dbusmanager.get_dbus_ifaces()
     daemon = dbus_ifaces['daemon']