Container should be responsive when window width is small

Feature Requests
,
2

I still believe that this is a valid FR but I managed to do it using custom CSS.

@media (max-width: 960px) {
  .editorWrapper {
    width: calc(100vw - 64px) !important;
  }
  
  .isPopup .editorWrapper {
    width: calc(100vw - 128px) !important;
  }
}

See here: Tutorial of custom css - #3 by Kerstie