[smuxi: 176/179] Frontend-GNOME: center preference dialog

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit 83583810607475de2825efe81cb9292ad8e0e96c
Author: Mirco Bauer <meebey meebey net>
Date:   Sat Oct 7 15:02:34 2017 +0800

    Frontend-GNOME: center preference dialog
    
    The preference dialog was showing up in the top left corner instead of centered.
    By setting the TransientFor property of the preference dialog it will
    automatically center the newly created window.

 src/Frontend-GNOME/Views/PreferencesDialog.cs |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/Frontend-GNOME/Views/PreferencesDialog.cs b/src/Frontend-GNOME/Views/PreferencesDialog.cs
index b171882..98e93a9 100644
--- a/src/Frontend-GNOME/Views/PreferencesDialog.cs
+++ b/src/Frontend-GNOME/Views/PreferencesDialog.cs
@@ -134,6 +134,7 @@ namespace Smuxi.Frontend.Gnome
             }
 
             Parent = parent;
+            TransientFor = parent;
             Builder = builder;
             Builder.Autoconnect(this);
             f_CategoryNotebook.ShowTabs = false;