TOT-79 show selected layers in legend

Daniel Silvarequested to merge
TOT-79-dsilva-dynamic-legend-layers into main

Closes TOT-79

1 - fixes bug in which the app would break when unselecting "Alertas Coletados"

2 - fixes bug in which the app would not turn on/off when selecting "Alertas Coletados"

3 - implements the dynamic legend (see bottom left):

image

Edited by Daniel Silva

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