Highlight tab on bell

[z33ky]

I often don't recognize the visual bell, because the window is active; it's just that I'm in another tab.
Could perhaps the background of the tab in the tabbar light up in a different color upon receiving a bell-event until it gets selected?

[caleb-]

Sorry for replying so late.
I will check the event system of libvte and see if I can support this. :-)