Modular PDA tweaks and bugfixes (#10440)

rscadd: "Handheld modular computers now use flashlights as a light source. They may be turned on/off via a button in the PC header, and have their brightness adjusted in Hardware Configuration."
    tweak: Message notifications should be much larger.
    tweak: "Chat messages are now logged to the NTNet Monitoring program."
    bugfix: "IDs are now unregistered from computers when the computer is destroyed."
    bugfix: "Fix Eject Battery having a global view range."
    bugfix: "Chat Clients are no longer set to 'silent' by default."
    backend: "Added a new slider component for VueUIs."

Closes #10439

code/modules/modular_computers/hardware/hardware.dm

@@ -13,6 +13,19 @@
 	var/damage_failure = 50				// "Failure" threshold. When damage exceeds this value the hardware piece will not work at all.
 	var/malfunction_probability = 10	// Chance of malfunction when the component is damaged
 
+// Default handling of hardware enable/disable. Override for specific functionality.
+
+/obj/item/computer_hardware/proc/enable()
+	. = enabled = TRUE
+
+/obj/item/computer_hardware/proc/disable()
+	. = enabled = FALSE
+
+/obj/item/computer_hardware/proc/toggle()
+	if(enabled)
+		return disable()
+	return enable()
+
 /obj/item/computer_hardware/attackby(obj/item/W, mob/living/user)
 	// Multitool. Runs diagnostics
 	if(W.ismultitool())