Thank you very much for this great idea. There are even some advantages doing it this way, e.g. no additional window needed.
The dedicated Example Tool has some advantages as well because it will be optimized for browsing example sentences. There will be a feature that semi-automatically adds example sentences to new entries added from the dictionary, and there it is better to have the two tools side by side.
Anyways, I like the idea that the users can choose which way they want to access the example sentences!