Can't scroll source listings with the keyboard

[CyberShadow]

Hi,

For some reason, it's not possible to scroll the source listings that simplecov-html creates with the keyboard in Chrome, even when you click inside the scrollable div.

[jaredbeck]

I can confirm that this feature is missing. Specifically, neither up/down arrows nor pageup/pagedown keys work.

Also, the "Find" action works for source code, but not for line numbers, so there's no way to jump to a line number (e.g. when you just want to know if one specific line is covered)