[css] save the column number on pageContent

views/basetemplates.py

@@ -129,7 +129,7 @@
 @monkeypatch(basetemplates.TheMainTemplate)
 def content_column(self, view, content_cols):
     w = self.w
-    w(u'<div id="pageContent" class="col-md-%(col)s" role="main">' % {
+    w(u'<div id="pageContent" class="col-md-%(col)s" role="main" data-col="%(col)s">' % {
         'col': content_cols})
     components = self._cw.vreg['components']
     self.content_components(view, components)