Enabling overlay scrollbars for a much cleaner look

[not-a-dev-stein]

Is your feature request related to a problem? Please describe.
We all know that Heroic is built with Electron, so it's basically like running a Chromium instance. But that also brings the possibility of enabling chrome flags through launch options. Which is where overlay scrollbars (which were gone and then re-introduced a while back) come into play to give a much cleaner look to the interface, which, without them, looks significantly worse (in my oppinion).

Describe the solution you'd like
I'm not sure if there is other way to do so than editing the .desktop file, but it would be nice if it at least came with --enable-features=OverlayScrollbar enabled by default (enabling other flags, like SmoothScrolling would be a nice bonus for a better feel as well).

Screenshots for context
Before enabling it (and yes, I am lazily using the example screenshot from the repo):

After enabling it: