Commands are not scrolled into view on long test runs

[brian-mann]

Commands are being cut off when there is a long test run instead of being scrolled into view.

I've also included a video and you'll see everything starting from 0:32 will be cut off.

headless.zip

[chrisbreiding]

I believe the issue is that as tests expand and collapse rapidly, there's a chance the command element's position gets reported "wrong" when queried, so it ends up cut off. To combat that, I've added a padding, so that the active test or command will always be slightly above the bottom instead of right at the bottom.

[brian-mann]

Fixed in 0.17.5.