Add button to reset marker on form display

Thanks @JeroenT ...
Actually the present way to remove a marker from the widget is to erase the Lat & Lon inputs fields,
but I understand it is not super clear as UI/UX and it could potentially be not possible if the user choose to hide the Lat & Lon inputs elements from the widget.

Hence I will QA and Review this MR from you, asap ...: not really sure if setting both Lat and Lon to 0 (as you do in js) will result in a removal of the input marker. will check it out.

itamair → closed merge request !11

Thanks @JeroenT ...
You Feature Request has been reviewed and approved and your MR refined to extend it in case of Google Maps map library (wasn't working on it otherwise), and to completely clean the Lat/Lon element, instead of setting them to 0,0.
Going to deploy a new Geofield Map release with this ...

It looks like the position variable is not used in the setMarkerPosition call, as it probably should:

    // Remove marker from the map.
    remove_marker: function (mapid) {
      let self = this;
      let position;
      if (self.map_data[mapid].click_to_remove_marker) {
        if (!window.confirm(Drupal.t('Remove marker from map ?'))) {
          return;
        }
      }
      switch (self.map_data[mapid].map_library) {

        case 'leaflet':
          position = {lat: 0, lon: 0};
          break;

        case 'gmap':
          position = new google.maps.LatLng(0, 0);
      break;
      }
      self.setMarkerPosition(mapid, {lat: 0, lon: 0});
      $('#' + self.map_data[mapid].latid).val(null);
      $('#' + self.map_data[mapid].lngid).val(null);
    },

thanks a lot @mably ... nice catches, all fixed. Going to deploy new release with these ...

Automatically closed - issue fixed for 2 weeks with no activity.