Prevent find widget from being cropped in AUX window

[juliapz]

Fixes #227546

Steps to Reproduce:

1. Open a text editor in the main window.
2. Open the find widget and focus on it. Notice how the blue outline fully outlines the input box.
3. Right-click the editor tab and select "Copy into New Window".
4. In the new window, open the find widget and focus on it again.

Before	After

[bpasero]

Thanks, this seems to work, and its fair that the ibwrapper would only take the size of the elements inside. But its not clear to me why the parent of ibwrapper exceeds this, maybe due to the border it sets.