Adds a lfwb-inspired orbiting pixel + flashing outline animation to the sprint and combat buttons (toggleable via prefs) (#11623)

* Adds a flashing effect to the sprint and combat mode toggles (toggleable via prefs)

* Adds the ability to change the color of the hud toggle flash as well

code/modules/mob/living/living_combat.dm

@@ -43,7 +43,7 @@
 /// Updates the combat mode HUD icon.
 /mob/living/proc/update_combat_mode_icon()
 	var/obj/screen/combattoggle/T = locate() in hud_used?.static_inventory
-	T?.update_icon_state()
+	T?.update_icon()
 
 /// Enables intentionally being in combat mode. Please try not to use this proc for feedback whenever possible.
 /mob/living/proc/enable_intentional_combat_mode(silent = TRUE, visible = FALSE)

code/modules/mob/living/living_sprint.dm

@@ -4,7 +4,7 @@
 
 /mob/living/proc/update_sprint_icon()
 	var/obj/screen/sprintbutton/S = locate() in hud_used?.static_inventory
-	S?.update_icon_state()
+	S?.update_icon()
 
 /mob/living/proc/update_hud_sprint_bar()
 	hud_used?.sprint_buffer?.update_to_mob(src)