Debug settings panel scrollable

[arl85]

As subject says, please make "debug settings" panel scrollable: on my 1366x768 screen I cannot see bottom checkboxes, even after trying moving the panel up to screen border.

[SuperSandro2000]

I have the same problem and screen resolution.

[Gammro]

Yep, same issue when I'm on my laptop. I did notice the list almost reached the bottom on my 1680x1050 resolution since 0.10, so it might be wise to include it before adding any more debug options.