message: fix: dropdown ui bug
diff: @@ -30,7 +30,7 @@ class DropdownMenu extends React.Component {
  placement={placement}
  width={width}
  onMouseEnter={onMouseEnter}
  - leftGap={1}
  + leftGap={0}
  onMouseLeave={onMouseLeave}
  >
  <ul className={menuCls}>
  