Ports Goonchat from Baystation. (#9635)

changes:

    rscadd: "Ported a new chat system, Goonchat, that allows for cool things like changing font style, size, spacing, highlighting up to 5 strings in the chat, and DARK MODE."
    rscadd: "Repeated chat messages can now get compacted. You can disable this in goonchat settings."
    rscadd: "You can change icon style to any font on your system."
    tweak: "The game window has been altered a bit to adjust for this."
    rscdel: "Removed skin style prefs as they are no longer used."

code/modules/modular_computers/file_system/programs/pai/signaler.dm

@@ -51,7 +51,7 @@
 	if(href_list["send"])
 		host.sradio.send_signal("ACTIVATE")
 		for(var/mob/O in hearers(1, host.loc))
-			O.show_message(text("\icon[] *beep* *beep*", host), 3, "*beep* *beep*", 2)
+			O.show_message(text("[icon2html(host, viewers(get_turf(src)))] *beep* *beep*"), 3, "*beep* *beep*", 2)
 		return 1
 
 	else if(href_list["freq"])

code/modules/modular_computers/file_system/programs/system/ntdownloader.dm

@@ -226,7 +226,7 @@
 		finish_from_queue(active_download)
 		active_download = null
 		playsound(get_turf(computer), 'sound/machines/ping.ogg', 40, 0)
-		computer.output_message("\icon[computer] <b>[capitalize_first_letters(computer)]</b> pings, \"Software download completed successfully!\"", 1)
+		computer.output_message("[icon2html(computer, viewers(get_turf(computer)))] <b>[capitalize_first_letters(computer)]</b> pings, \"Software download completed successfully!\"", 1)
 
 	SSvueui.check_uis_for_change(src)