I'm using the elementary-icon-theme on Ubuntu 16.04 and I'd like to change the right-most icon in the top panel (power off/restart menu).
This is how it looks (the monitor icon):
I'm trying to change it back to default ubuntu one:
I'm assuming this can be done by just swapping the icon files in the /usr/share/icons but how would I go about it?
Or is there a different way of doing it?