Update for July 18 Bug fix and QOL additions

-Bug fixed with boss rush challenge. Should no longer crash if an arrow appears at a specific time at the end of the challenge.
-Initials will be saved and set as the default input when inputting records.
-Game will pause if the window is unfocused.
-Spacing error corrected in Japanese credits.
-Fixed certain characters portraits not changing properly.
-Damage values will appear near the boss HP when doing damage to bosses.