Too much output when started from terminal

[morkeltry]

In my opinion, outputting most recent kernels first from ukuu --list is non ideal, since the kernels 99% of use cases require will be hidden by older ones.

On first run, however, current install info and all but the oldest kernels are displaced by 'errors' that ukuu cannot find a cached version of each kernel's info. This info should be a warning and should be supressable. Running ukuu --list from Ubuntu 17, there are enough kernels and errors that kernels 3.x.x and 4.x.x are not visible in the list, even by scrolling back the page.