Yeah, I usually see it for seconds a year. If I saw it often enough to worry about theming it, I'd rather spend my time on fixing whatever caused me to have to see it so ofen.
Look at the screenshots. They are all about booting multiple OSes or distros, and should make sense for those who switch between them often. ("Why" is another question.)
I think this is the kind of thing I would do If I had to choose between OSs with frequency, either home lab/experimentation or linux for stuffs and windows for games kind of scenario.
So there is nothing to fix, the nice choice screen is a feature.
When I'm on the move I'll power up a PC without sitting down and come back to it later, but never "wander off" if I'm already sitting there since it only takes about 20 seconds to cold boot, 5 seconds of which is intentional delay in case I want to choose something other than my default OS from the bootmenu.
I say it is really nice not to have any problems with the boot process myself.
> but never "wander off" if I'm already sitting there since it only takes about 20 seconds
Ah I take it you don't have ADHD then? For me, it's not the 20 seconds - it's the fact that this time it might be the 2 minutes boot because it did an update in the background. So I'm happy to assume that any boot/reboot is 2 minutes long.