Pressing escape should close detail view

[ProjectInfinity]

When clicking a file either in a commit or from unstaged files you have to press the X to close the file view, allowing the Escape key to close the detail view would allow keyboard driven users to navigate the app easier.

[JetpackDuba]

I'm planning to do it for dialogs in the 1.0.0 but other components may have to wait a bit more, as there are other prioritary issues.

If the event handling is easy enough I may also implement it as I implement it for the dialogs but not sure.

[JetpackDuba]

I'm keeping this open as there is a little bug: All the dialogs/windows that accept the ESC as an input will be closed, even if they are not in-front. Aside from that, closing the diff, blame, history and dialogs with escape has been implemented.