[gnome-builder] newcomers: add icon-dropshadow CSS class

[Christian Hergert <chergert src gnome org>]

commit 2a580a2e37f83f62a622ea1eb516825320320f9a
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 15 08:15:53 2019 -0800

    newcomers: add icon-dropshadow CSS class

 src/plugins/newcomers/gbp-newcomers-project.ui | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/plugins/newcomers/gbp-newcomers-project.ui b/src/plugins/newcomers/gbp-newcomers-project.ui
index c67630871..7a541821e 100644
--- a/src/plugins/newcomers/gbp-newcomers-project.ui
+++ b/src/plugins/newcomers/gbp-newcomers-project.ui
@@ -13,6 +13,9 @@
             <property name="visible">true</property>
             <child>
               <object class="GtkImage" id="icon">
+                <style>
+                  <class name="icon-dropshadow"/>
+                </style>
                 <property name="expand">true</property>
                 <property name="pixel-size">96</property>
                 <property name="visible">true</property>