message: Modified the markdown component so that the inner column's handle's mouse target is larger
diff: .dragdroppable-column .resizable-container-handle--right {
  /* override the default because the inner column's handle's mouse target is very small */
  - right: -10px !important;
  + right: 0 !important;
  }
  .dragdroppable-column .dragdroppable-column .resizable-container-handle--right {
  /* override the default because the inner column's handle's mouse target is very small */
  - right: 0px !important;
  + right: 0 !important;
  }
  .resizable-container-handle--bottom {
  