Updated Markers Widget to allow Markers to be deleted + reworked the widget code to make it slightly more readable + updated iframe for markers to allow markers to be submitted per-user

// Labels

.label-variant(@color) {
  background-color: @color;

  &[href] {
    &:hover,
    &:focus {
      background-color: darken(@color, 10%);
    }
  }
}