Rewrite jQuery .show() and .hide()

I got same results in Chrome Firefox and Safari for that codepen.

https://codepen.io/finnsky/pen/eYxgLQO

`hidden` actually hide div with class CSS specificity.
But failure in cascade selector and obviously when !important.

Hi all!

From my point of view we should not optionally use these functions as such. And those scripts that continue to be used are given a warning. Perhaps less strict. So that these warnings can pass functional tests.

For reliable hiding, I added [data-hidden] as suggested.

And reworked layout-builder.js for an example of work.

I also think that .show() and .hide() are not the only functions that can be handled this way. So I renamed the script.

I need a review of the approach here

Seems to have open threads but appears to have a failure in 5277, can the other MR be closed or hidden?

To test replace
"lint:core-js-passing": "node ./node_modules/eslint/bin/eslint.js --quiet --config=.eslintrc.passing.json .",
by
"lint:core-js-passing": "node ./node_modules/eslint/bin/eslint.js --config=.eslintrc.passing.json .",

and run yarn lint:core-js-passing

smustgrave → changed the visibility of the branch 3167377-rewrite-jquery-.show to hidden.

smustgrave → changed the visibility of the branch 11.x to hidden.

Hiding patches and old MRs for clarity

Current MR 5277 appears to have a test failure and may need a rebase (maybe it fixes the test)