Only consider visible inputs for fill_in etc

In responsive layouts there may be distinct inputs for mobile and desktop layouts
that share the same label.
If only one of them is visible, no 'strict mode violation' error should be raised.

Author: ftes

lib/phoenix_test/playwright.ex

@@ -873,6 +873,7 @@ defmodule PhoenixTest.Playwright do
           css -> css |> Selector.css() |> Selector.and(Selector.label(label, opts))
         end
       )
+      |> Selector.concat("visible=true")
       |> Selector.build()
 
     selector