Engines on vehicle must have fuel in tanks to enable/disable them

[CoroNaut]

Describe the bug

Engines on a vehicle must have fuel to use the "control individual engines" option for whatever particular engine doesn't have fuel.

Attach save file

N/A trivially reproducible

Steps to reproduce

1. Get car with electric engine
2. Install gas engine on it
3. Gas engine is automatically set to be used, and you can't turn set it to not be used
4. Put gas into the vehicle and the option to control the engine becomes available to use it or not.

Expected behavior

I should be able to select what engines are used for vehicle propulsion regardless of whether there is fuel in the tanks for whatever particular engine I'm interested in.

Screenshots

Notice that in the second image, the option is grayed out. It can be selected, but can't be toggled.

Versions and configuration

• OS: Windows
  • OS Version: MINGW/CYGWIN/MSYS2 on unknown Windows version
• Game Version: 5d3940a [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [ Dark Days Ahead [dda], Slowdown Fungal Growth [no_fungal_growth], Stats Through Skills [StatsThroughSkills] ]

Additional context

No response

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