Add missing assets to qch file

Reviewed-by: Alessandro Portale

doc/qtcreator.qdocconf

@@ -32,10 +32,16 @@ qhp.QtCreator.extraFiles       = \
                           style/style_ie7.css \
                           style/style_ie8.css \
                           style/OfflineStyle.css \
+                          style/narrow.css \
+                          style/OfflineStyle.css \
+                          style/superfish.css \
+                          style/superfish_skin.css \
                           images/qt-logo.png \
                           images/qtcreator-screenshots.png \
                           scripts/functions.js \
                           scripts/jquery.js \
+                          scripts/narrow.js \
+                          scripts/superfish.js \
                           images/api_examples.png \
                           images/api_lookup.png \
                           images/arrow_down.png \