[gnome-tweaks] windows: Add Center New Windows tweak

[Jeremy Bicha <jbicha src gnome org>]

commit d98f9d8243a5d3772a076fed09019ab93a7cfc4c
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Tue May 1 10:36:31 2018 -0400

    windows: Add Center New Windows tweak
    
    This is turned off by default, but it is turned on in Ubuntu's
    next generation theme (codenamed Communitheme)

 gtweak/tweaks/tweak_group_windows.py | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtweak/tweaks/tweak_group_windows.py b/gtweak/tweaks/tweak_group_windows.py
index b88287d..3577acb 100644
--- a/gtweak/tweaks/tweak_group_windows.py
+++ b/gtweak/tweaks/tweak_group_windows.py
@@ -206,6 +206,7 @@ TWEAK_GROUPS = [
         # https://help.gnome.org/users/gnome-help/stable/shell-windows-tiled.html
         GSettingsSwitchTweak(_("Edge Tiling"),"org.gnome.mutter", "edge-tiling",
                         desc=_("When on, windows are tiled when dragged to screen edges.")),
+        GSettingsSwitchTweak(_("Center New Windows"),"org.gnome.mutter", "center-new-windows"),
         GSettingsSwitchTweak(_("Resize with Secondary-Click"),"org.gnome.desktop.wm.preferences", 
"resize-with-right-button"),
         GSettingsComboTweak(_("Window Action Key"),
                         "org.gnome.desktop.wm.preferences",