refactoring from jQuery to modern JavaScript

[bjohansebas]

As discussed in #1568, these will be the next steps to stop using jQuery in favor of the browser's API:

• [x] First PR (Refactor Menu): #1568

  • Remove dropit
  • Remove functions related to dropit
  • Refactor the menu according to the new structure
  • Create styles according to the new structure
  • Add new menu functionality in a new file

• [x] Second PR (Remove Unused Functions): #1698

  • Remove ismobil.js
  • Remove logic for page editing (no longer used since the footer was updated)
  • Remove logic for window.location.pathname === '/3x/api.html' (no longer used since almost all URLs now go to /en/*)
  • Remove function related to #tags-side-menu

• [ ] Third PR (Adapt get elements):

  • Update scroll top logic
  • Adapt element retrieval and events
  • Add overlay logic to the menu
  • Adapt code highlighting

• [ ] Fourth PR (Adapt Functions):

  • Update logic for the i18n banner
  • Update logic for the closer title (used in the API)
  • Adapt cookies logic to ES6

• [ ] Fifth PR (Remove jQuery Dependency, #1569):

  • Remove link to jQuery

[bjohansebas]

The search bar in dark mode is broken in terms of design. @chrisdel101 Should I fix it in the first PR or better in a separate PR?

[chrisdel101]

I'm just looking at #1590 since I think you fixed it over there right? Sorry for delay.

[bjohansebas]

@chrisdel101 don't worry, that issue is not fixed yet.

[chrisdel101]

Oh is this a different issue? I see. Maybe a small separeate PR would work, but things are getting kind of backed up. Still, it's not really related to the refactor, so separate issue would be my vote.

[ShubhamOulkar]

@bjohansebas If you allow me, I like to work on this.

[bjohansebas]

@ShubhamOulkar Yes, please finish it.

[ShubhamOulkar]

@ShubhamOulkar Yes, please finish it.

Great, I plan to do it this Sunday.