[devhelp] Rename string "Side pane" to "Side panel"

[Sébastien Wilmet <swilmet src gnome org>]

commit e0a04c54dc3308a6716432003a5bea42491d6228
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat May 6 12:57:45 2017 +0200

    Rename string "Side pane" to "Side panel"
    
    To be consistent with gedit.

 src/dh-window.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/dh-window.ui b/src/dh-window.ui
index 2ec8923..5d87e27 100644
--- a/src/dh-window.ui
+++ b/src/dh-window.ui
@@ -90,7 +90,7 @@
     </section>
     <section>
       <item>
-        <attribute name="label" translatable="yes">_Side pane</attribute>
+        <attribute name="label" translatable="yes">_Side panel</attribute>
         <attribute name="action">win.show-sidebar</attribute>
         <attribute name="stateful">true</attribute>
       </item>