[REFACT] Move graph module template where it belongs

gargantext/graph/static/TODO

-mv /srv/gargantext/static/js/tina* .

gargantext/graph/views.py

@@ -37,7 +37,7 @@ def explorer(request, project_id, corpus_id):
 
     # rendered page : explorer.html
     return render(
-        template_name = 'graphExplorer/explorer.html',
+        template_name = 'explorer.html',
         request = request,
         context = {
             'debug'     : settings.DEBUG   ,