[libdazzle] Mark missing strings for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 1d93c711f73ffa531eb45f5c02f11bf27a09e65c
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Sep 28 14:04:53 2017 +0200

    Mark missing strings for translation
    
    Doesn’t do us much good until bug #785830 is fixed,
    but better do it now than forget it later.

 src/shortcuts/dzl-shortcut-theme-editor.ui |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/shortcuts/dzl-shortcut-theme-editor.ui b/src/shortcuts/dzl-shortcut-theme-editor.ui
index 171e21c..9cb9986 100644
--- a/src/shortcuts/dzl-shortcut-theme-editor.ui
+++ b/src/shortcuts/dzl-shortcut-theme-editor.ui
@@ -50,7 +50,7 @@
                   <object class="GtkTreeViewColumn" id="title_column">
                     <property name="expand">true</property>
                     <property name="sizing">fixed</property>
-                    <property name="title">Action</property>
+                    <property name="title" translatable="yes">Action</property>
                     <child>
                       <object class="GtkCellRendererText" id="title_cell">
                         <property name="xpad">8</property>
@@ -63,7 +63,7 @@
                   <object class="GtkTreeViewColumn" id="shortcut_column">
                     <property name="sizing">fixed</property>
                     <property name="min-width">195</property>
-                    <property name="title">Shortcut</property>
+                    <property name="title" translatable="yes">Shortcut</property>
                     <child>
                       <object class="GtkCellRendererText" id="shortcut_cell">
                         <property name="xalign">1.0</property>