Primitive wrapper property editors should use valueOf

[mbien]

• the wrapper class constructors are all deprecated for removal -> lets use valueOf
• this will also allow setting wrapper properties to null. The only exception is Character, since CharEditor (for primitives) maps null to a char before it is passed to the CharacterEditor which never sees null.
• affects code generation in GUI forms

fixes #7049

test:
1)

public class TextField extends JTextField {
    
    private Long valLong = 123L;
    private Double valDouble = 123.0;
    private Float valFloat = 123.0f;
    private Integer valInteger = 123;
    private Character valCharacter = 'a';
    private Short valShort = 123;
    private Byte valByte = 123;
    private Boolean valBoolean = true;
    
    private long primLong = 123;
    private int primInt = 123;
    
    // generate getter/setters
}

2. create JPanel form and drag TextField into form via design view.
3. click on the component in design view, edit the properties via Properties window, check generated code which should now look like:

        textField1.setText("textField1");
        textField1.setValBoolean(java.lang.Boolean.FALSE);
        textField1.setValByte(Byte.valueOf((byte)111));
        textField1.setValCharacter(Character.valueOf('b'));
        textField1.setValDouble(Double.valueOf(111.0D));
        textField1.setValFloat(Float.valueOf(111.0F));
        textField1.setValInteger(Integer.valueOf(111));
        textField1.setValLong(Long.valueOf(111L));
        textField1.setValShort(Short.valueOf((short)111));