[MIRROR] Fixes network bugs and adjusts program access

[SkyratBot]

Original PR: NebulaSS13/Nebula#1053

Fixes a few bugs with networks and their related machinery, and adds an option for grant based program access

• Fixes mainframes going invisible after opening their panel once
• Fixes Network Locks not having their UI properly updated.
• Changes how the transfer files backend works. Now it by default transfers the file with an option for cloning the file instead. Beforehand it used store_file to add the datum to the file list of whatever was being copied to, without removing itself from the former location, which resulted in every program downloaded from a mainframe being one instance. This lead to issues like #1037, which is now fixed.
• Fixes a bug where running a program without proper access would break the computer until it was restarted.
• Added an option for program access to be determined by grants through the access controller. If/when full replacement of the access system with grants occurs, this should probably be reworked., but it works for now.