P: Make lock and unlock icons larger and more visually distinct

[jbinco]

The lock/unlock icons are too small and not visually distinct enough.  Using an "unlock" icon with the lock shackle facing away from the lock rather than just a small gap would improve usabliity.

 

 

These icons are visually indistinguishable on high resolution screens.

 

 

Something like this would be more clear: