lineHeight
Type: Integer
Availability: Read or write at any time
The lineHeight property of the JadeSkinMenu class contains the height of each menu line item.
The default value of zero (0) indicates that the default menu spacing is used.
If the value of this property is not zero (0) and it is less than the height of the font text + 2, the height that is used is the height of font text height + 2.