Fix cutscene in COP 2-5 "Ancient Vows"

[MarianArlt]

I affirm:

• that I agree to Project Topaz's Limited Contributor License Agreement, as written on this date
• that I've tested my code since the last commit in the PR, and will test after any later commits

_ Fixes a wrong cutscene ( #1420 ) after entering through the Dilapidated Gate in Misareaux Coast (F-7) and clicking the Spacial Displacement
_ This affected mission 4-2 (csid 8) so I added one optional dialogue and a new default dialogue there while at it
_ Minor style guide clean up for the Dilapidated Gate (4383c20)

Captures used for this PR:
Missions: COP 2-4 (An Eternal Melody) ~ COP 2-5 (Ancient Vows)
Chains of Promathia: COP 4-1 (Sheltering Doubt)
Chains of Promathia: COP 4-2 (The Savage)

[zach2good]

Looks fine to me, thanks for all the cleanup!

Just two small style dings, then this is ready to go.

[MarianArlt]

Please check Despechiaire again, I cleaned that one up too, structured it a little to make it legible and added comments.
The "Sheltering Doubt" optional dialogue needed a missionStatus condition or else it would trigger after going to Bastok.
I moved the event references to the bottom; wouldn't want to delete those, somebody put in effort to pick them, but they shouldn't clutter the functions.

(Force Push fixed a missing Unix (LF) line end)

[ibm2431]

Was initially merged into a safekeeping branch, but I'll "approve" this and merge the branch into release.