Clicks refactor (#20321)

Added various events to the dcs system in regards to click handling.
Refactored various mouse related procs.
Fixed MUI mask.
Fixed AI jump on double click.
Fixed some runtimes with the click handler system.
Updated the click handler system.
Fixed fireman carry.

code/modules/admin/admin_verbs.dm

@@ -759,7 +759,7 @@ var/list/admin_verbs_cciaa = list(
 		return
 	var/datum/click_handler/handler = mob.GetClickHandler()
 	if(handler.type == /datum/click_handler/build_mode)
-		usr.PopClickHandler()
+		usr.RemoveClickHandler(/datum/click_handler/build_mode)
 	else
 		usr.PushClickHandler(/datum/click_handler/build_mode)
 	feedback_add_details("admin_verb","TBMS") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!

code/modules/admin/buildmode/buttons.dm

@@ -76,4 +76,4 @@
 /obj/effect/bmode/quit/OnClick()
 	var/datum/click_handler/handler = usr.GetClickHandler()
 	if(handler.type == /datum/click_handler/build_mode)
-		usr.PopClickHandler()
+		usr.RemoveClickHandler(/datum/click_handler/build_mode)

code/modules/admin/buildmode/click_handler.dm

@@ -1,5 +1,5 @@
 /datum/click_handler/build_mode
-	handler_flags = CLICK_HANDLER_REMOVE_ON_MOB_LOGOUT
+	flags = CLICK_HANDLER_REMOVE_ON_MOB_LOGOUT
 	var/dir
 
 	var/list/build_modes