Bug 38569 Override/Implement Methods dialog should expand first element in viewer.
The treeviewer in the Override/Implement dialog isn't automatically revelaing the first element in the list, but it should to be consistent with other dialogs.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/AddDelegateMethodsAction.java
for (int i = 0; i < finMeths.length; i++) {
				fFilter.put(createSignatureKey(finMeths[i]), finMeths[i]);
			}
			IMethod[] filter = type.getMethods();
			for (int i = 0; i < filter.length; i++) {
				fFilter.put(createSignatureKey(filter[i]), filter[i]);
			}
			for (int i = 0; i < fields.length; i++) {
				IType fieldType = resolveTypeOfField(fields[i]);
				if (fieldType == null)
					continue;
				IMethod[] methods = resolveMethodsHierarchy(fieldType);
				List accessMethods = new ArrayList();
				
				for (int j = 0; j < methods.length; j++) {
					boolean publicField = JdtFlags.isPublic(methods[j]);
					boolean constructor = methods[j].isConstructor();
					boolean finalExist = fFilter.get(createSignatureKey(methods[j])) != null;
					if (publicField && !constructor && !finalExist) {
						accessMethods.add(new Methods2Field(methods[j], fields[i]));
						numEntries++;
					}
				}
				Object[] m = accessMethods.toArray();
				Methods2Field[] mf = new Methods2Field[m.length];
				for (int j = 0; j < m.length; j++) {
					mf[j] = (Methods2Field) m[j];
				}
				fTreeMap.put(fields[i].getElementName(), mf);
				fFieldMap.put(fields[i].getElementName(), fields[i]);