Just did some apt-get updates and upgrades and on the version now as below and
the issues disappeared.
The Grub screen is back to normal now with the small font. Issue can be closed.
Linux H3U1 4.13.0-37-lowlatency #42-Ubuntu SMP PREEMPT Wed Mar 7
15:30:40 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
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Ubtun 17.10 Grub menu corrupt
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