test_abstractPart_resizeActive fails with 2026-12

Likely something was changed in the Platform with https://github.com/eclipse-simrel/simrel.build/commit/38ed8d6f352bdaa81d8e8fb65dcbb00654f5e130, causing the page layout to now have a different size.

```
org.opentest4j.AssertionFailedError: expected: but was:
at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:177)
at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1145)
at org.eclipse.wb.tests.designer.core.AbstractJavaTest.assertEditor(AbstractJavaTest.java:273)
at org.eclipse.wb.tests.designer.rcp.RcpModelTest.assertEditor(RcpModelTest.java:126)
at org.eclipse.wb.tests.designer.rcp.model.rcp.PageLayoutTest.test_abstractPart_resizeActive(PageLayoutTest.java:1206)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.eclipse.wb.tests.designer.core.model.parser.AbstractJavaInfoTest$JavaInfoExtension.interceptTestMethod(AbstractJavaInfoTest.java:88)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
```

The `CTabFolder` created in this test used to have a width of 585, which is now 592 and thus causing the ratios to be off. Not sure if this is caused by an SWT or an UI change.

Start with PageLayoutTest.test_abstractPart_resizeActive at PageLayoutTest.java:1206 and inspect the failing assertEditor call and its generated CTabFolder dimensions. Compare the expected 0.47 ratio with the observed 0.46 result, then run this test to verify behavior across the affected platform or UI configuration. Done means the test reflects the intended layout behavior and passes reliably.

Written by the indexing model from the issue text.