Move time for lighting changes from a scale to a fixed length

PDA's start off again, but the code is still there.
forceMove() now calls Moved() and has some other minor tidying up. This means teleporting will update the lights around you right away.

code/controllers/_DynamicAreaLighting_TG.dm

@@ -36,7 +36,7 @@
 #define LIGHTING_CAP_FRAC (255/LIGHTING_CAP)				//A precal'd variable we'll use in turf/redraw_lighting()
 #define LIGHTING_ICON 'icons/effects/alphacolors.dmi'
 #define LIGHTING_ICON_STATE "white"
-#define LIGHTING_ALPHA_CHANGE_PER_SECOND 75					//Alpha change that will occur each second
+#define LIGHTING_TIME 1.2									//Time to do any lighting change. Actual number pulled out of my ass
 #define LIGHTING_DARKEST_VISIBLE_ALPHA 230					//Anything darker than this is so dark, we'll just consider the whole tile unlit
 
 /datum/light_source
@@ -166,7 +166,6 @@
 	else
 		if(light.strength == new_luminosity)
 			return
-		light.remove_effect() // we need to remove the effect before changing strength
 	light.strength = new_luminosity
 	luminosity = new_luminosity
 	light.changed = 1
@@ -264,7 +263,7 @@
 				newalpha = 0
 
 		if(lighting_object.alpha != newalpha)
-			var/change_time = (abs(newalpha - lighting_object.alpha)) / LIGHTING_ALPHA_CHANGE_PER_SECOND
+			var/change_time = LIGHTING_TIME
 			animate(lighting_object, alpha = newalpha, time = change_time)
 			if(newalpha >= LIGHTING_DARKEST_VISIBLE_ALPHA) //Doesn't actually make it darker or anything, just tells byond you can't see the tile
 				animate(luminosity = 0, time = 0)