[gnome-photos] Add context to "Export"

[Piotr Drąg <piotrdrag src gnome org>]

commit 971419e010abf44b277c9d7eefffce4d7365bdca
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Feb 6 21:02:02 2016 +0100

    Add context to "Export"
    
    It needs to be translated differently than in other instances.

 src/photos-export-dialog.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/photos-export-dialog.ui b/src/photos-export-dialog.ui
index 345466f..559e65d 100644
--- a/src/photos-export-dialog.ui
+++ b/src/photos-export-dialog.ui
@@ -21,7 +21,7 @@
 <interface domain="gnome-photos">
   <template class="PhotosExportDialog" parent="GtkDialog">
     <property name="border_width">5</property>
-    <property name="title" translatable="yes">Export</property>
+    <property name="title" translatable="yes" context="dialog title">Export</property>
     <property name="resizable">0</property>
     <property name="modal">1</property>
     <property name="type_hint">dialog</property>