[IMP] this commit translates the hardcoded strings that appears in graph view (addon web_graph)
[IMP] makes the graph view in pivot table mode always display 'Total' instead of the current measure/title (addon web_graph)
[IMP] css changes to improve look and usability of pivot table view (addon web_graph)
[FIX] changes the hardcoded string 'undefined' into 'Undefined' in pivot table (addon web_graph)
[FIX] correctly compute the attribute 'length' in a query_group so that the list view properly display groups when grouped by 'date:interval' (addon web)
[MERGE] merge from trunk
[MERGE] merge trunk-new-graphview-ged into trunk (tweaks to pivot table look, and some bug fixes)