prevent capslock from breaking shortcut commands

[thesuperzapper]

Is your feature request related to a problem? Please describe.

Having capslock on prevents the shortcut keys from working (as they are case-sensitive).

For example, I might press y and wonder why the YAML is not showing up, only to release I had capslock on so k9s was actually seeing Y, which does nothing.

Describe the solution you'd like

We could either put a warning on the screen when capslock is on, or do something like detect the capslock state, and reverse the case of all shortcut keypresses.

Describe alternatives you've considered

N/A

Additional context
N/A