Updating cust_text.php files with standard comments

changed languages/Afrikaans-UTF8
changed languages/Arabic-UTF8
changed languages/Croatian-UTF8
changed languages/French
changed languages/Polish-UTF8
changed languages/SerbianCyrillic-UTF8
changed languages/Spanish
changed languages/Spanish-UTF8
Modified 8 files.
All cust_text.php files are now up to v13.0 standard.
The originals of files that have been changed are at cust_text.bak in the original directory.
Updated the Mod Manager Options.