fix(select): non label-fixed select breaks input styling

[0o001]

#752

[fatihhayri]

I also found a solution as follows.

:host([placeholder]) :where(.select-open, .selected) .label,
:host(:not([placeholder])) .selected .label {
  display: none;
}```

[ogunb]

Hey @0o001, thanks for your contribution!

Looking at the UI review, it seems like we have some unwanted side effects. I'm closing this one in favor of #760.

@fatihhayri @erbilnas fyi.