Implements PDA Beeping (#15616)

code/modules/pda/app.dm

@@ -2,7 +2,6 @@
 /datum/data/pda
 	var/icon = "tasks"		//options comes from http://fontawesome.io/icons/
 	var/notify_icon = "exclamation-circle"
-	var/notify_silent = 0
 	var/hidden = 0				// program not displayed in main menu
 	var/category = "General"	// the category to list it in on the main menu
 	var/obj/item/pda/pda	// if this is null, and the app is running code, something's gone wrong
@@ -37,7 +36,7 @@
 			to_chat(L, "[bicon(pda)] [message]")
 			SStgui.update_user_uis(L, pda) // Update the receiving user's PDA UI so that they can see the new message
 
-	if(!notify_silent)
+	if(!pda.silent)
 		pda.play_ringtone()
 
 	if(blink && !(src in pda.notifying_programs))
@@ -67,7 +66,9 @@
 	if(pda.current_app)
 		pda.current_app.stop()
 	pda.current_app = src
-	return 1
+	if(!pda.silent)
+		playsound(pda, 'sound/machines/terminal_select.ogg', 15, TRUE)
+	return TRUE
 
 /datum/data/pda/app/proc/update_ui(mob/user, list/data)
 	return
@@ -80,7 +81,6 @@
 	size = 1
 	category = "Utilities"
 
-
 /datum/data/pda/utility/scanmode
 	var/base_name
 	category = "Scanners"
@@ -100,6 +100,8 @@
 		name = "Disable [base_name]"
 
 	pda.update_shortcuts()
+	if(!pda.silent)
+		playsound(pda, 'sound/machines/terminal_select.ogg', 15, TRUE)
 	return TRUE
 
 /datum/data/pda/utility/scanmode/proc/scan_mob(mob/living/C, mob/living/user)