Only fold inner types when preference is set #3031

[fedejeanne]

What it does

Avoids folding outer types if the preference Initially fold these elements > Inner Types is checked.

Fixes #3031

How to test

Use this class:

package plugin;

class B {
	static class B1 {

	}
}

public class A {
	static class A1 {
	}

	static class A2 {
		public static void main(String[] args) {
			Runnable r = new Runnable() {
				// Should be folded
				@Override
				public void run() {

				}
			};
		}

	}
}

Activate/Deactivate the preference, it should look like this

---

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)

[iloveeclipse]

LGTM, but would it be possible to add test to the FoldingTestSuite?