Support scrolling to end with END key

[Alloc86]

Not sure if that's even possible, especially with the web based version, but can you add support to use the END key to immediately scroll all the way down in the log view?

[l-y-n-x]

I also missed this functionality and implemented it some weeks ago.
I now created a pull request #39
The hotkey is 'v' for cross-platform compatibility.