Some Processing improvements (#80693)

## About The Pull Request
Got the idea from #80682. A lot of parent procs don't do anything, some
are just formatted in a bad way, and others early return and do no ops,
it's bad in general but this should give us a head start.

Some good overhead saved here

code/modules/modular_computers/file_system/programs/radar.dm

@@ -173,8 +173,8 @@
 //We use SSfastprocess for the program icon state because it runs faster than process_tick() does.
 /datum/computer_file/program/radar/process()
 	if(computer.active_program != src)
-		STOP_PROCESSING(SSfastprocess, src) //We're not the active program, it's time to stop.
-		return
+		//We're not the active program, it's time to stop.
+		return PROCESS_KILL
 	if(!selected)
 		return