.icons: use single byte characters to avoid prompt length issues on non-utf8 setups
Revert ".icons: use single byte characters to avoid prompt length issues on non-utf8 setups"

This reverts commit c3a1de7d588638a3f71012946bd978193b38552d.
[+]: always use the English language & UTF-8
[!] fixed color-fallback for the "bash_prompt"