docs: Add Mopidy-Musicbox-Webclient to the web extensions list

(cherry picked from commit eedaf0eb3b)

docs/clients/http.rst

@@ -15,27 +15,7 @@ created one, please notify us so we can include your client on this page.
 See :ref:`http-api` for details on how to build your own web client.
 
 
-Mopidy MusicBox Webclient
+.. include:: /ext/musicbox_webclient.rst
-=========================
-
-.. image:: mopidy-musicbox-webclient.png
-    :width: 1275
-    :height: 600
-
-The first web client for Mopidy, made with jQuery Mobile by Wouter van Wijk.
-Also the web client used for Wouter's popular `Pi Musicbox
-<http://www.pimusicbox.com/>`_ image for Raspberry Pi.
-
-    With Mopidy MusicBox Webclient, you can play your music on your computer
-    (Raspberry Pi) and remotely control it from a computer, phone, tablet,
-    laptop. From your couch.
-
-    This is a responsive HTML/JS/CSS client especially written for Mopidy, a
-    music server. Responsive, so it works on desktop and mobile browsers. You
-    can browse, search and play albums, artists, playlists, and it has cover
-    art from Last.fm.
-
-    -- https://github.com/woutervanwijk/Mopidy-MusicBox-Webclient
 
 
 .. include:: /ext/moped.rst

docs/ext/musicbox_webclient.rst

@@ -0,0 +1,21 @@
+Mopidy MusicBox Webclient
+=========================
+
+.. image:: /ext/musicbox_webclient.png
+    :width: 1275
+    :height: 600
+
+The first web client for Mopidy, made with jQuery Mobile by Wouter van Wijk.
+Also the web client used for Wouter's popular `Pi Musicbox
+<http://www.pimusicbox.com/>`_ image for Raspberry Pi.
+
+    With Mopidy MusicBox Webclient, you can play your music on your computer
+    (Raspberry Pi) and remotely control it from a computer, phone, tablet,
+    laptop. From your couch.
+
+    This is a responsive HTML/JS/CSS client especially written for Mopidy, a
+    music server. Responsive, so it works on desktop and mobile browsers. You
+    can browse, search and play albums, artists, playlists, and it has cover
+    art from Last.fm.
+
+    -- https://github.com/woutervanwijk/Mopidy-MusicBox-Webclient

docs/ext/web.rst

@@ -16,3 +16,6 @@ to show up here, follow the :ref:`guide on creating extensions <extensiondev>`.
 
 
 .. include:: /ext/moped.rst
+
+
+.. include:: /ext/musicbox_webclient.rst