webpack5 arrow function arguments compatibility of gui/core module.

[chaosue]

after rebuild of gui.ajax core module pnpm run build-core-prod, the page will end up with the errors below:

maybe it's the same issue as of #493.

there're some explanations on https://www.ginkonote.com/users/flo/articles/migration-guide-to-webpack-5@javascript

the cause might be "arguments objects is not available in arrow function after Webpack 5+",
the packed frontend/front-srv/assets/gui.ajax/res/js/core/index.js is not evalable, so the loading of pydio.min.js by pydio.boot.in.js fails.

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