Bug 42767 Grabbing vertically on add constructor/ gen contructors using fields action
The source actions related to creating constructors is not relayouting properly on resize. The lowermost checkbox is grabbing vertically when it shouldn't be. In the case of the gen. constructors using fields dialog, the upper combobox and label are grabbing vertical space when they shouldn't be either.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/GenerateNewConstructorUsingFieldsAction.java
/* (non-Javadoc)
	 * Method declared on SelectionDispatchAction
	 */
	public void run(IStructuredSelection selection) {
		try {
			IType selectionType= getSelectedType(selection);
			if (selectionType == null) {
				MessageDialog.openInformation(getShell(), getDialogTitle(), ActionMessages.getString("GenerateConstructorUsingFieldsAction.not_applicable")); 
				return;
			}
			IField[] selectedFields= getSelectedFields(selection);
			
			IEditorPart editor= null;
			if (selectedFields != null)
				editor= EditorUtility.openInEditor(selectedFields[0]);
			else
				editor= EditorUtility.openInEditor(getSelectedType(selection).getCompilationUnit());
			if (canRunOn(selectedFields)) {
				run((IType) EditorUtility.getWorkingCopy(selectedFields[0].getDeclaringType()), selectedFields, editor, false);
				return;
			}
			Object firstElement= selection.getFirstElement();
			if (firstElement instanceof IType)
				run((IType) EditorUtility.getWorkingCopy((IType) firstElement), new IField[0], editor, false);
			else if (firstElement instanceof ICompilationUnit) {
				IType type= ((ICompilationUnit) firstElement).findPrimaryType();
				if (type.isInterface()) {
					MessageDialog.openInformation(getShell(), fDialogTitle, ActionMessages.getString("GenerateConstructorUsingFieldsAction.interface_not_applicable")); 					
					return;
				} else