Major update

- Renames some files, tidies up some of the code
- Adds forceMove() and Topic() sanity checks from github suggestions
- Properly implements tablets, usage flags and portable devices in general. For now, adds codersprites (final release will have actual sprites)
- Fixes some bugs
- Assigns file sizes to programs

code/modules/modular_computers/hardware/hard_drive.dm

@@ -70,7 +70,7 @@
 /datum/computer_hardware/hard_drive/proc/recalculate_size()
 	var/total_size = 0
 	for(var/datum/computer_file/F in stored_files)
-		total_size = F.size
+		total_size += F.size
 
 	used_capacity = total_size
 

code/modules/modular_computers/hardware/network_card.dm

@@ -27,7 +27,7 @@
 
 // 0 - No signal, 1 - Low signal, 2 - High signal. 3 - Wired Connection
 /datum/computer_hardware/network_card/proc/get_signal(var/specific_action = 0)
-	if(!holder) // Hardware is not installed in anything. No signal. How did this even get called?
+	if(!holder && !holder2) // Hardware is not installed in anything. No signal. How did this even get called?
 		return 0
 
 	if(!enabled)
@@ -39,9 +39,14 @@
 	if(!ntnet_global || !ntnet_global.check_function(specific_action)) // NTNet is down and we are not connected via wired connection. No signal.
 		return 0
 
-	if(holder.z in config.station_levels) // Computer is on station, High signal
+	if(holder && holder.z in config.station_levels) // Computer is on station, High signal
 		return 2
 
+	if(holder2)
+		var/turf/T = get_turf(holder2)
+		if((T && istype(T)) && T.z in config.station_levels)
+			return 2
+
 	if(long_range) // Computer is not on station, but it has upgraded network card. Low signal.
 		return 1