warning when entering File > Package Manager: Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

[Tobiasz Jarczyk]

Steps to reproduce:
1. Open poedit in terminal.
2. In poedit, go to File > Package Manager.
3. In termial you can see the following warnings:
$ poedit

(poedit:5953): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

(poedit:5953): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

(poedit:5953): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

(poedit:5953): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: poedit 1.5.4-1build1
ProcVersionSignature: Ubuntu 3.12.0-8.16-generic 3.12.6
Uname: Linux 3.12.0-8-generic x86_64
ApportVersion: 2.12.7-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Jan 5 18:45:30 2014
InstallationDate: Installed on 2013-10-15 (81 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131015)
SourcePackage: poedit
UpgradeStatus: Upgraded to trusty on 2013-11-05 (61 days ago)