Rework power outage event (#13117)

* Rework power outage event

* Added compile time flag for event fixing itself when it ends

* Review Cleanup 1

* Fixed up line ending conflicts

* Going whole hog with a side of bacon

* Whoops, forgot the sausage and Canadian Bacon

* Better messaging and makes APC Overload an offical non-random event

* Test merge feedback rework

code/modules/power/apc.dm

@@ -244,7 +244,7 @@
 			else if(has_electronics && !terminal)
 				. += "Electronics installed but not wired."
 			else /* if(!has_electronics && !terminal) */
-				. += "There is no electronics nor connected wires."
+				. += "There are no electronics nor connected wires."
 		else
 			if(stat & MAINT)
 				. += "The cover is closed. Something wrong with it: it doesn't work."

code/modules/power/smes.dm

@@ -29,11 +29,6 @@
 	var/output_level_max = 200000	// cap on output_level
 	var/output_used = 0				// amount of power actually outputted. may be less than output_level if the powernet returns excess power
 
-	//Holders for powerout event.
-	var/last_output_attempt	= 0
-	var/last_input_attempt	= 0
-	var/last_charge			= 0
-
 	var/name_tag = null
 	var/obj/machinery/power/terminal/terminal = null