[gtk] icon-browser: Fix name alignment

[Matthias Clasen <matthiasc src gnome org>]

commit 19d9d69343466199c8f9d5ae8ca9e96246e8ecbe
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 1 00:27:58 2019 -0400

    icon-browser: Fix name alignment
    
    The icon names were left-aligned, not centered
    under the icon.
    
    Closes: https://gitlab.gnome.org/GNOME/gtk/issues/18

 demos/icon-browser/window.ui | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/demos/icon-browser/window.ui b/demos/icon-browser/window.ui
index 1d4f7d3fcf..3b5d8b161d 100644
--- a/demos/icon-browser/window.ui
+++ b/demos/icon-browser/window.ui
@@ -95,6 +95,7 @@
                       <object class="GtkCellRendererText" id="text_cell">
                         <property name="xpad">10</property>
                         <property name="ypad">10</property>
+                        <property name="xalign">0.5</property>
                       </object>
                     </child>
                   </object>