[gnome-todo] edit-pane: add key accelerator for due date popup

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit d6dce3dedae4f132b8efff9ae3d4e6e27b60842f
Author: djb <db0451 gmail com>
Date:   Thu Oct 27 02:52:16 2016 +0100

    edit-pane: add key accelerator for due date popup
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773563

 data/ui/edit-pane.ui |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/edit-pane.ui b/data/ui/edit-pane.ui
index 4bc94ac..33c2faf 100644
--- a/data/ui/edit-pane.ui
+++ b/data/ui/edit-pane.ui
@@ -163,9 +163,11 @@
                     </child>
                     <child>
                       <object class="GtkLabel" id="due_date_dim_label">
+                        <property name="label" translatable="yes">D_ue Date</property>
+                        <property name="use_underline">True</property>
+                        <property name="mnemonic_widget">date_button</property>
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Due Date</property>
                         <property name="xalign">0</property>
                         <style>
                           <class name="dim-label"/>