[Feature Request] Allow hiding/collapsing the timeline's "overview chart"

[lostintangent]

Unless a request instance generated a lot of events, I find the readability of the gantt chart to be high enough to not really need the high-level overview chart above it, and it would be ideal if I could collapse it or hide it entirely. Chrome's network tab allows this, and it's a nice way to regain some vertical real-estate and reduce visual distractions.

On my screen, I've seen cases where the gantt chart needed to overflow for just a couple of rows, and therefore, if it was able to capture the space taken up by the chart, I would have been able to see the entire waterfall without scrolling.

[lostintangent]

Furthermore, if #87 and #88 were implemented, I could also see it being nice to collapse/hide the Top 3 slowest events section as well, since that takes up quite a bit of space, and might not be as critical if the gantt chart itself focused you into the right events (since the "hottest" events list is just a hyperlink into the gantt chart anways).

[chetsangnil]

Thanks for the awesome feedback! We do have a mock for this feature but we didn't have time to implement it yet. We'll loop back to this feature for sure.