Disable bbox highlight when using only searcharea

[danieldegroot2]

First query: only bbox, with bbox shown on map.

Leave bbox shown on map

Second query: only searchArea (larger than bbox)

Bbox still shown on map, can not disable bbox shown on map because query does not include {{bbox}}. Rest of map is greyed out but results are correctly shown for the search area outside the lingering bbox.

(workaround: user adds bbox to query and disables the highlight manually)