Ability to search in HTML stats

[khanguy00]

Is your feature request related to a problem? Please describe.
When looking for a file in HTML stats, I usually use Cmd+F of browser, but that doesn't work for most of cases because there are thousand of files, and most of them are really small to display in HTML result. So I think it's better if we can filter files, and leave the file path in each bundle.

Of course, I can look into the json result, but I think looking into GUI is much helpful.

Describe the solution you'd like
Clone bundlestats object and remove unmatched files on the fly, before rendering them on UI. I know it's hard, but worth to do.

Describe alternatives you've considered
I don't have any.

WDYT?