[devhelp] Add sidebar toggler to the menu

[Aleksander Morgado <aleksm src gnome org>]

commit c46c1f237da83afbc2246cf36f822a2fdfe3e684
Author: Miguel Vaello Martínez <miguel vaellomartinez gmail com>
Date:   Sun May 8 16:49:12 2016 +0200

    Add sidebar toggler to the menu
    
    As the hide/show sidebar shortcut already exists, it makes
    sense to have this option to select in the menu in order to
    toggle the sidebar visibility easily.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763518

 src/dh-window.c  |    2 +-
 src/dh-window.ui |    5 +++++
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/dh-window.c b/src/dh-window.c
index 1e8e555..d72140a 100644
--- a/src/dh-window.c
+++ b/src/dh-window.c
@@ -521,7 +521,7 @@ static GActionEntry win_entries[] = {
         { "find-next",        find_next_cb },
 
         /* view */
-        { "show-sidebar",     NULL, NULL, "false", show_sidebar_cb },
+        { "show-sidebar",     NULL, NULL, "true", show_sidebar_cb },
         { "zoom-in",          zoom_in_cb },
         { "zoom-out",         zoom_out_cb },
         { "zoom-default",     zoom_default_cb },
diff --git a/src/dh-window.ui b/src/dh-window.ui
index 8b68234..2ec8923 100644
--- a/src/dh-window.ui
+++ b/src/dh-window.ui
@@ -7,6 +7,11 @@
         <attribute name="label" translatable="yes">New _Tab</attribute>
         <attribute name="action">win.new-tab</attribute>
         <attribute name="accel">&lt;Primary&gt;t</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">Side _Panel</attribute>
+        <attribute name="action">win.show-sidebar</attribute>
+        <attribute name="accel">F9</attribute>
         <attribute name="use-underline">True</attribute>
       </item>
     </section>