[gnome-disk-utility/piotrdrag/untranslatable-app-name] Mark missing string for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 7688918c453fb9c53cfac788d7b31062cbbec753
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Aug 3 12:57:48 2019 +0200

    Mark missing string for translation
    
    Closes https://gitlab.gnome.org/GNOME/gnome-disk-utility/issues/144

 src/disks/ui/headerbar.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/disks/ui/headerbar.ui b/src/disks/ui/headerbar.ui
index c3012e57..4bfe9a67 100644
--- a/src/disks/ui/headerbar.ui
+++ b/src/disks/ui/headerbar.ui
@@ -7,7 +7,7 @@
     <child>
       <object class="GtkHeaderBar" id="disks-side-headerbar">
         <property name="can_focus">False</property>
-        <property name="title">Disks</property>
+        <property name="title" translatable="yes">Disks</property>
         <property name="show-close-button">True</property>
         <child>
           <object class="GtkMenuButton" id="app-menu-button">