Few CTF changes. (#77533)

## About The Pull Request
- Fixed that if you chose to press a cross while toggling instagib mode
it will react as `Yes` instead of just canceling
- Added description for assault class (with shotgun and rocket gloves)
so you know that you have faster moving speed and lover armor.
- Fixed that when you already chose a team and try to click on other
teams spawners you'll be asked to consider other teams to make them
equal.
- Decreased time of recharge start delay from 20 seconds to 12, because
when it takes soo much to regen your shield its just faster to die and
respawn with a new one.
- Added 1.7 scope to marksmans rifle.
- Little cleanup.

**Everything is arguable.**
**Ask if something is unclear or confusing.**
## Why It's Good For The Game
Less buggs, less wondering why do you die in 1 hit and others don't, a
little bit of consistency.
## Changelog
🆑
qol: CTF assault class' (with shotgun and rocket gloves) description now
mentions that it has low armor and increased moving speed.
balance: Decreased CTF recharge start delay for shields from 20 seconds
to 12 seconds.
balance: Marksmans rifle now has 1.7 scope.
fix: When toggling instagib mode for CTF and pressing a cross now will
just cancel instead of proceeding.
fix: When clicking on other CTF teams spawners and after you already
chose your team no more will ask you to join some other team to make
them even.
/🆑

code/modules/admin/verbs/secrets.dm

@@ -587,7 +587,7 @@ GLOBAL_DATUM(everyone_a_traitor, /datum/everyone_is_a_traitor_controller)
 				return
 			var/datum/ctf_controller/ctf_controller = GLOB.ctf_games[selected_game]
 			var/choice = tgui_alert(usr, "[ctf_controller.instagib_mode ? "Return to standard" : "Enable instagib"] mode?", "Instagib Mode", list("Yes", "No"))
-			if(choice == "No")
+			if(choice != "Yes")
 				return
 			ctf_controller.toggle_instagib_mode()
 			message_admins("[key_name_admin(holder)] [ctf_controller.instagib_mode ? "enabled" : "disabled"] instagib mode in CTF game: [selected_game]")