Browser-compat-data: Data with "This value is recognized, but has no effect." should be shown as not supported

[yume-chan]

Currently there are some data with { version_added: true, note: "This value is recognized, but has no effect." } in css.properties.align-content and css.properties.justify-content

I think it's normal that if someone sees a "Yes" on a compatibility table, they think they can use the feature. But in fact it doesn't work.

I suggest we set the version_added to false until these browsers truly support them.

One more thing, Edge also recognize some value (but has no effect), they need to be updated.

[teoli2003]

It is a bit more tricky than this as even if a feature "does nothing", the fact that it is supported may alter some side behaviour.

{
  justify-content: space-evenly;  
  justify-content: start;
}

has "No effect" on a browser that supports start but doesn't apply an effect.
But will behave as space-evenly for a browser that doesn't support start at all.

So we need to store the distinction.

I think using false in such cases is even misleading, although I agree that the current message is a bit light. Maybe we should use partial_implementation for these cases?