[MERGE] merge from trunk
[FIX] fixes problems due to the preceding merge (resolved conflict was not properly resolved) (addon web_graph)
[IMP] optimizes graph view to avoid reloading data in some cases (such as removing a filter from the search view) (addon web_graph)
[FIX] fixes the tooltip position in chart mode (graph view).  The position was wrong because the parent position was not 'relative'.  (addon web_graph)