Improve "Editors" Preference Page

[BeckerWdf]

Let's make sure issue is not already fixed in latest builds first.

• I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

Steps to reproduce

Currently the "Editor" preference page looks like this:

I just was wondering why the "Number of opened..." setting is indented but the "Size of.." setting is not.
After some thinking I realized that the "Number of opened.." setting depends on the checkbox above.
Due to the "Size of.." input field the distance between the input field and the checkbox is bigger then the distance between the other check boxes. This also makes it harder to recognize that these two are linked.

I would propose we put a "Close mode" frame around it. Something similar as we have it here:

• I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.