Paste rnd

Handle the case of images with several rendering settings per image
The viewer currently only supports the latest. This will require some major changes not covered by this PR.
This PR fixes https://trac.openmicroscopy.org.uk/ome/ticket/11767

To test
 * log as user-1
 * Expand ```Foo>Images```
 * Open [image 01 - XYCh-10x] and [image 01 - XYCh-20x]
 * Click in the viewer toolbar the copy rendering setting button.
 * Go to the second viewer. click Paste
 * the Paste should occur w/o a crash

see ticket for error.