Excerpt-includeplus macro editor has no scrollbar

Steps to reproduce:

1. Create a space with version management

2. Create a number of (>~20 pages under the same parent) pages in that space

3. Create a page and in the editor select the excerpt-includeplus macro

Expected result:
You can browse to the page you want to include, including those pages att

Actual result:
You cannot scroll down in the macro editor dialog.

Workaround:
Add the following CSS rule to your space (Space Tools > Look and Feel > Stylesheet) or globally (General Configuration > Stylesheet or as embedded style tag in General Configuration > Custom HTML)