Support multiple images with the default media picker

[TheEnbyWitch]

Is your feature request related to a problem? Please describe.
The default media picker does not allow selection of multiple images, despite the image field supporting that as a feature

- label: "Zdjęcia"
  name: photos
  widget: image
  media_library:
    config:
      multiple: true

Describe the solution you'd like
If possible, I would like there to be a checkbox on every image that I could tick, kinda like there is one in the WordPress image picker

Describe alternatives you've considered
I have considered Cloudinary and Uploadcare, but I don't want to depend on another service for this kind of stuff on this project.

[tomrutgers]

Closing this in favor of #1032