Is it possible to write a plugin to alter the menu layout?

[PGA]

... I use, on a regular basis, just the following: Fade In, Fade Out and Normalize. On an irregular basis: I have also used Changed Tempo and Equalization. The rest are irrelevant for my work with Audacity - at present. I don't want to "kill" them, just "hide" them.

Tip: a handy group of four keys that are currently unused are the Alt+arrow keys.

I have:
Alt + <- for Fade-in
Alt + -> for Fade-out (now replaced with Steve's excellent Pro-fade)
Alt + up-arrow for Amplify
Alt + down-arrow for Normalize (just used for DC offset removal)

WC

That is exactly what I settled on. Great minds... and all that!
And on a desktop system with a real keyboard the NUMPAD keys are all begging to be used, too!