Adjustments on Markers: user can't post new marker if too close to another one + clicking the create button will create a "placeholder" marker to show where the marker will be posted

// Labels

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

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