Plugin configuration window appears behind 'Plugins' window

[mrk]

Hi there!

In first i would say that i like Preferences pane very much, it's a nice thing. Wohoo!
I just tried 0.2.2-rc (rev. 648) and i've found some issues with preferences.

1. If i go to Edit -> Preferences -> Plugins and, for example, activate Notification
area plugin and later click on 'Configure plugin' button, then configuration window
('Personalize your notification area plugin') is appears behind Preferences window
so i cant see it until move Preferences window from center to corner. It is not fatal,
but annoing. I thout first that calling plugin preferences isn't working at all.

2. I dont know hot to reproduce, but while playing with plugins configuration windows
 i've got this on terminal:

Traceback (most recent call last):
  File "/home/mrk/tmp/0.2/GTG/taskbrowser/preferences.py", line 281, in on_plugin_configure
    plugin_id = self.plugin_store.get_value(iter, PLUGINS_COL_ID)
TypeError: iter must be a GtkTreeIter

Maybe anyone has a clue how to get this.

Thanks for great software!

[Paul Natsuo Kishimoto (khaeru)]

#1 was my sloppy mistake introduced at the same time the Preferences dialog was introduced. Thanks for bringing it up! The attached branch should fix it.

#2 I am not sure about, I think that might be a different problem.