Field of Vision component. (#12075)

* Hopeless WIP for vision cones.

* Core component and hooks done

* Removing clutter.

* linter bashing me for using statements as args.

* Ok.

* continue

* bring back the macro

* Configs and openspace filter.

* Chat plane, reset perspective signal, mechs/vehicles cases, machineries.

* view, viewers and spoopy ghosts.

* Renamed component, admin fun button and snowflakes robots.

* Whoopsie.

* Yikes

* test merge tweak.

* radial yaketi sax.

* Fixed tgui UIs, some messages not displayed to the target.

* Documentation and a little bugfix.

* Pulling QoL, seventh plane made in this PR.

* Fix.

* Tweaks and improvements.

* Update randomverbs.dm

code/modules/client/client_procs.dm

@@ -902,23 +902,27 @@ GLOBAL_LIST_EMPTY(external_rsc_urls)
 			new_size = "15x15"
 //END OF CIT CHANGES
 
+	var/list/old_view = getviewsize(view)
 	view = new_size
-	apply_clickcatcher()
+	var/list/actualview = getviewsize(view)
+	apply_clickcatcher(actualview)
 	mob.reload_fullscreen()
 	if (isliving(mob))
 		var/mob/living/M = mob
 		M.update_damage_hud()
 	if (prefs.auto_fit_viewport)
 		fit_viewport()
+	SEND_SIGNAL(mob, COMSIG_MOB_CLIENT_CHANGE_VIEW, src, old_view, actualview)
 
 /client/proc/generate_clickcatcher()
 	if(!void)
 		void = new()
 		screen += void
 
-/client/proc/apply_clickcatcher()
+/client/proc/apply_clickcatcher(list/actualview)
 	generate_clickcatcher()
-	var/list/actualview = getviewsize(view)
+	if(!actualview)
+		actualview = getviewsize(view)
 	void.UpdateGreed(actualview[1],actualview[2])
 
 /client/proc/AnnouncePR(announcement)