Image Editor UI improvements

The image editor's stage is now stateful and remembers its manually set size. In addition, the layout is more compact.

(CMS-30696)

Fixed Issue Styling For Nested Link Lists

If you had an annotated link list with am embedded link list in the annotation, error and warning styles always appeared on both link lists, regardless of whether the embedded link list had issues or not. This is fixed, each link lists displays issue highlights only for itself.

(CMS-29406)