make ui string translatable

Change-Id: Ic65c7d3ea00f83642b7c9f0bcafb71837e474862
diff --git a/cui/uiconfig/ui/colorpage.ui b/cui/uiconfig/ui/colorpage.ui
index 2027800..c620ade 100644
--- a/cui/uiconfig/ui/colorpage.ui
+++ b/cui/uiconfig/ui/colorpage.ui
@@ -430,7 +430,7 @@
                    </child>
                    <child>
                      <object class="GtkButton" id="edit">
                        <property name="label">_Pick…</property>
                        <property name="label" translatable="yes">_Pick…</property>
                        <property name="visible">True</property>
                        <property name="can_focus">True</property>
                        <property name="receives_default">True</property>