#53 Additional mnemonics needed

[Travis Bear]

I think we are only halfway there with the mnemonics added to the console UI. We can now drive menu items without using the mouse (which is awesome -- thank you!) but what we still need are mnemonics that allow selecting arbitrary tabs.

And a nice-to-have would be an easy, discoverable way to give the focus to the slider that would allow adjusting the sample interval with the arrow keys.