Shuttle Call/Recall Tracing in Announcements

- Emergency  shuttle call/recall announcements will say when a tracing attempt has been successful, as well as explicitly telling players how to view them
- Clarified language further on how emergency shuttle tracing is done
- Increased tracing success rate from 60% to 70%
- Removed a lot of duplicated code by moving all the priority_announce() calls to incall()

code/modules/power/singularity/narsie.dm

@@ -32,6 +32,7 @@
 	if(A)
 		notify_ghosts("Nar-Sie has risen in \the [A.name]. Reach out to the Geometer to be given a new shell for your soul.")
 
+	sleep(50)
 	if(emergency_shuttle)
 		emergency_shuttle.incall(0.3) // Cannot recall