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/NTNet/NTNet.dm

@@ -5,6 +5,7 @@ var/global/datum/ntnet/ntnet_global = new()
 /datum/ntnet
 	var/list/relays = list()
 	var/list/logs = list()
+	var/list/messages = list()
 	var/list/available_station_software = list()
 	var/list/available_antag_software = list()
 	var/list/available_software = list()
@@ -44,14 +45,17 @@ var/global/datum/ntnet/ntnet_global = new()
 	new /datum/ntnet_conversation("NTNet Relay", TRUE)
 
 // Simplified logging: Adds a log. log_string is mandatory parameter, source is optional.
-/datum/ntnet/proc/add_log(var/log_string, var/obj/item/computer_hardware/network_card/source = null)
+/datum/ntnet/proc/add_log(var/log_string, var/obj/item/computer_hardware/network_card/source = null, var/messaging=FALSE)
 	var/log_text = "[worldtime2text()] - "
 	if(source)
 		log_text += "[source.get_network_tag()] - "
 	else
 		log_text += "*SYSTEM* - "
 	log_text += log_string
-	logs.Add(log_text)
+	if(!messaging)
+		logs.Add(log_text)
+	else
+		messages.Add(log_text)
 
 	if(logs.len > setting_maxlogcount)
 		// We have too many logs, remove the oldest entries until we get into the limit
@@ -134,6 +138,7 @@ var/global/datum/ntnet/ntnet_global = new()
 // Removes all logs
 /datum/ntnet/proc/purge_logs()
 	logs = list()
+	messages = list()
 	add_log("-!- LOGS DELETED BY SYSTEM OPERATOR -!-")
 
 // Updates maximal amount of stored logs. Use this instead of setting the number, it performs required checks.