Print highlighted filename in unicode

Print_filename_in_fileselector()

src/unicode.h

@@ -30,6 +30,9 @@ size_t Unicode_strlen(const word * str);
 /// equivalent of strdup() for our Unicode strings
 word * Unicode_strdup(const word * str);
 
+/// Copy unicode string
+void Unicode_strlcpy(word * dst, const word * src, size_t len);
+
 /// Compare an unicode string with a regular Latin1 string
 int Unicode_char_strcmp(const word * s1, const char * s2);