Fix 0010977: Use of invalid viewing_bug_advanced_details_title string

The 'viewing_bug_advanced_details_title' string has been removed with
the simple vs advanced differentiation. However,
print_all_bug_page_word.php still relies upon this string and thus
cannot be used due to a missing string error. This patch uses a similar
existing string instead.

Additionally, another string on the page had the wrong variable name and
would cause the page to crash. This typo has been fixed.