Fix graph collapsing in single graph page.

Reproduction for this bug:

Step 1) access http://.../list/service-a/section-1
Step 2) fold graph x (memorized into local storage)
Step 3) access http://.../view_graph/service-a/section-1/graph-x
Step 4) graph x is hidden (is automatically folded on page load and I cannot collapse it)