Describe the bug

Unsupported overrides are kept when switching compilers which leads to a confusing difference between what the menu shows, the overrides button's active state implies, and what the compiler actually ends up using.

Steps to reproduce

1. Enable override A for compiler 1
2. Switch to compiler 2, which does not support override A
3. The overrides button will be green to show there is an override, but the compiler vetoes it and doesn't pass it to the command line.
4. If you were to open the overrides menu here, the unsupported override would be deleted.
5. Switch back to compiler 1
6. If you did not open the menu while on compiler 2, the override is now back, as compiler 1 supports it. If you did open the menu, it's gone and you would have to put it back.

In the reproducer link, I:

• Added an "action" override for TableGen.
• Switched to the gcc compiler for C.
• You will see that it claims to have an active override for action, but in fact, gcc doesn't support that override.
• Opening the menu will clear action.

Expected behavior

I have no idea what the expected behaviour here was intended to be, but I can think of 2 models that might work:

1. Switching to a new compiler removes all unsupported overrides. When you go back to the first compiler you must add them again (draft PR: Remove unsupported overrides when the compiler changes #5747)
2. Unsupported overrides are kept when switching compilers, simply hidden from the UI, and do not cause the overrides button to be green (draft PR: Put Overrides button in success state only when overrides are actually used #5744)

Option 1 is the simplest to implement, option 2 would mean you can "carry" an option between compilers at least temporarily.

Maybe you compile for target pentiumm with gcc, and switch to MSVC quickly, then go back. It might be nice to have kept the target option so you don't have to add it. But again, I'm not sure what the original intent here is.

The libraries menu is a bit different because it lists only enabled libraries that are compatible with the current compiler. I am not sure if it removes unsupported libraries while doing this though.

Reproduction link

https://godbolt.org/z/aPPeP3bzs

Screenshots

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Operating System

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Browser version

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