Change QM Flame Graph to inverted icicle graph

[roborourke]

When the flamegraph is shown on a web page it becomes very hard to use when the call stack gets deep as you have to scroll down to see anything. This is especially true for the display within the Query Monitor panel.

It would be far more straightforward to use in inverted or "icicle" graph mode. If possible it'd be nice to filter some of the options like tooltips and the elided colours for example as well.

[roborourke]

Are we using this? https://github.com/spiermar/d3-flame-graph