Change title height of "variation" theme

themes/variation/close-active.xpm

themes/variation/close-inactive.xpm

themes/variation/close-pressed.xpm

themes/variation/hide-active.xpm

themes/variation/hide-inactive.xpm

themes/variation/hide-pressed.xpm

themes/variation/maximize-active.xpm

themes/variation/maximize-inactive.xpm

themes/variation/maximize-pressed.xpm

themes/variation/menu-active.xpm

themes/variation/menu-inactive.xpm

themes/variation/menu-pressed.xpm

themes/variation/shade-active.xpm

themes/variation/shade-inactive.xpm

themes/variation/shade-pressed.xpm

themes/variation/stick-active.xpm

themes/variation/stick-inactive.xpm

themes/variation/stick-pressed.xpm