Fix graphics UNICODE names

[szepeviktor]

Some names were not matching UNICODE names.

Inspired by @kianmeng

[szepeviktor]

Command to list name parts
grep 'rune =' ./semigraphics.go|cut -f2|cut -d' ' -f1|sed -e 's#[A-Z]#\n&#g'|sort -u

[rivo]

Thanks!

[szepeviktor]

Glad to contribute.