Annotation from iframe does not trigger editing annotation text

### Steps to reproduce
1. Select test inside iframe
2. Click "Annotate"
3

### Expected behaviour
Annotations bar papers with editing dialog for annotation and text is highlighted after saving annotation.

### Actual behaviour
Annotations bar papers but WITHOUT editing dialog for annotation

### Browser/system information
Version 87.0.4280.141 (Official Build) (64-bit) (same on Firefox)

### Additional details
sample page with iframe at the bottom right (e.g. for the element Connect with Floor):
https://evlibra.github.io/Archi_Body/#b90805b2-7a2c-47e2-86a7-b2d5d1dd95a6

Note (workaround): if on step 2 do click Highlit - the text is hilited, and it is possible to edit its annotation. But that are extra steps - instead, annotation shall work on iframe in the same way as on its parent page