fix error while removing favorite with the star symbol in legend or map
fix error while removing favorite with the star symbol in legend or map

janschulte/js-sensorweb-client,52North/js-sensorweb-client,EHJ-52n/js-sensorweb-client,52North/js-sensorweb-client,janschulte/js-sensorweb-client,EHJ-52n/js-sensorweb-client