Modular PDAs: The End of an Era (#10319)

PDAs are dead, long live PDAs. All trace of old PDAs has been scoured from the codebase, and in its place are modular computer PDAs that are feature-equivalent. Essentially every PDA function except the Syndicate detonation feature and Notepad has been ported over, and battery life for handheld computers has been boosted alongside the addition of charging cables to make things easier.

code/modules/modular_computers/file_system/computer_file.dm

@@ -3,6 +3,7 @@ var/global/file_uid = 0
 /datum/computer_file
 	var/filename = "NewFile"								// Placehard_drive. No spacebars
 	var/filetype = "XXX"									// File full names are [filename].[filetype] so like NewFile.XXX in this case
+	var/filedesc = null
 	var/size = 1											// File size in GQ. Integers only!
 	var/obj/item/computer_hardware/hard_drive/hard_drive	// Harddrive that contains this file.
 	var/unsendable = FALSE									// Whether the file may be sent to someone via NTNet transfer or other means.