Sierra Ops 7/19/2021 hotfix

Fixed a critical issue with an existing code which automatically fixes the missing St. Niliam codex entry.

Added sound effects to a video that plays in Mission 3 battle part 2.

Fixed the 1st opportunity unlock in Mission 3 battle part 2. It's supposed to be unlocked by completing Capture the Station NH Style.

Fixed an issue with text boxes where it glitches sometimes.

Removed double spaces in dialogues.