Suggestion: Lock sidebearings when kerning

When Kerning, I usually use keyboard short cut. But sometimes I mistake the shortcut keys and then side bearing is changed. These two commands(change kerning and sidebearing) have very similar combinations. The differnde is just a option-key. And the fingers position are very confusing.
Is there any way to lock sidebearing when adjusting kerning?

This is implemented already. Keep clicking the kern lock symbol at the bottom until you see the lock symbol:

Thank you.