[BUG] Sandbox Mode cannot scroll to see controls in Safari

[TJScalzo]

I cannot scroll through the controls within the Sandbox simulator. No scrollbar appears and clicking on an input first doesn't allow scrolling using the scroll wheel or anything.

This means the start button can't be reached and so Sandbox Mode can't be used. This seems to only be an issue in Safari because a scrollbar is visible in Firefox and Chrome.

Looking at the simulator's HTML, as shown by Safari in its inspector, the div with class "simplebar-content-wrapper" has overflow: hidden; in its style attribute. Changing it to overflow: scroll; lets me scroll using the scroll wheel, even though a scrollbar doesn't appear. I don't know how SimpleBar works so I'm not sure I'm able to help fix this issue.