The locale code is turned into an asset path with an underscore
instead of a dash.

The language codes are transformed by `I18n.locale` into a code with a
dash. But the resources for translating are always stored in a path
using a `_` separating the language and the region code.

Made the insertion of the English Translation File conditional + removed window.translations from the global object to save some memory

Closes #35985

Remove multiple methods of including monaco related code and remove static monaco assets from public

Signed-off-by: Rémy Coutable <remy@rymai.me>

move webpack publicPath setup earlier in the bootstrap processes to avoid ES module execution order issues

Start of the new navigation by redesigning just the top navigation menu.
This is only shown when a cookie is set.

Part of #32794

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add test.js and test.css to disable animations during testing and include these in _head when testing

Add test.js and test.css to disable animations during testing and include these in _head when testing

Add the following line to GDK Procfile to play with it:

    webpack: exec support/exec-cd gitlab npm run dev-server