Rack - API and Usability Improvements

[mrschick]

When merged this pull request will:

• Fix object variable acre_sys_rack_initialized not being a reliable indicator for whether the Racks are fully initialized and added to the vehicle. This seems to have been the main cause behind past Rack-API jankiness.
  Will close #1312.
• Add API function acre_api_fnc_removeAllRacksFromVehicle:
  It removes all Racks from a Vehicle after handling the preceding initialization (if necessary).
• Add API function acre_api_fnc_replaceRacksOnVehicle:
  It replaces all Config-defined Racks on a vehicle of a specific type with a given other type, while preserving other config properties like Name/Shortname, allowed/denied positions and Wired Intercom.
  Use case: for an old-school scenario, put just this function into your APC/Helicopters' Init fields in 3DEN to replace all of its default VRC-103 Racks with VRC-64s. Eliminates the need to initialize, delete all Racks and add new VRC-64s with a custom script.
• Add documentation for new API functions.
• Improve German and Italian translations of short "Dash", to reduce overflow in the rack/intercom info dialog.
• Fix text wrapping of the rack/intercom info dialog in order to prevent content overflows.
  Will close #1311.
• Improve handling of a player's connection to Racks when exiting and re-entering a vehicle:
  • Don't reset the custom PTT order of Rack Radios;
  • Automatically Re-"Use" Racks;
• Fix Rack-mounted AN/PRC-77 interaction showing "Channel: 1" instead of frequency in MHz.