Fixes dropdown placement outside panels

[MSnoeren]

Currently the panel switcher on authentication pages only works in the top left. Updating the w-fit class to w-full fixes this behavior.

[what-the-diff]

PR Summary

• Modified Styling of Language Switch Component
  The change in the code is related to the design/layout aspect of the "Language Switch" component on the website. The layout change makes the Language Switch bar span across the full width of the page, instead of having it fit to the width of its contents. This adjustment will ensure that the Language Switch bar will be more comprehensive and user-friendly, enhancing the overall user experience.