Wrong caret position on undo.

[Artur Delura]

Tested with ​http://ckeditor.com/demo (which reports v4.4.5) using latest Chrome.

1. Clear editor contents.
2. Add some online image using dialog (Be sure to preload image in dialog).
3. Type some text - I typed foo.
4. Execute undo command.
5. Execute redo command.

Actual result: Caret position is right after image but should be where it was before executing undo command.

Problem: Native getSelection().getRanges()[0] returns wrong offset which is 0 but should be 3. And this wrong range is saved in snapshot before executing undo command.

I checked already whether selection is changed somehow by CKEditor code by simply adding onselectionchange listener. But it's not.

Case to verify

We think that the TC reported in ​http://dev.ckeditor.com/ticket/12515#comment:14 is related to this ticket and should be verified together with it.