LiveForm shouldn't crash if id attr isn't included

[bcardarella]

To match the behavior of HTML, id isn't required when using <form phx-submit="save"> ... so <LiveForm phx-submit="save">... should have similar behavior.

We shouldn't be injecting an id either. The client should allow the developer to opt-in with recovery.

[carson-katri]

I think this can be accomplished by creating a FormModel that's local to the LiveForm element if an ID is not present. If an ID is provided, the form model would be held by the coordinator.

[bcardarella]

I want to aim for feature parity with HTML. Is there a reason why id would he required for SwiftUI? If not then I'd like to match HTML which works, but is less featureful, without id

[carson-katri]

No reason why an ID would be necessary. I was just noting one possible implementation.

[bcardarella]

Gotcha, I think we'll find ourselves with less WTFs later on if we match these primitive behaviors. I cannot highlight any one instance this would happen but its always the ones we don't anticipate