Popover mode

<date-picker auto-submit popover="right" />

<date-picker auto-submit popover="bottom-left" />

<date-picker
  auto-submit
  :popover="{
    placement: 'right',
    offsetX: 10,
    offsetY: 10
  }"
/>

accepted:

true | false

top | bottom | right | left

top-left | top-right | bottom-right | bottom-left

{ offsetX: Number, offsetY: Number }

{ placement: String, offsetX: Number, offsetY: Number }