Feature request: enable keyboard backlight for 5 sec upon keypress

[otraupe]

If I watch movies in the dark and have the keyboard backlight automatically disabled upon full-screen, specific keys, e.g. 'f' for exiting full-screen, are hard to find. :D

On my XPS I am used to pressing 'Ctrl', which like any other key wakes the backlight.

Would be great to have the option here as well. Could be any key, could be the 'Fn' key in the bottom left corner, which is easy to find, or could even be configurable.

[UP-NOW]

Same issue here, my loq backlight is way too bright for me(brighter than my screen) even at the low setting.