SelectFeatures control in harsh environments (Cluster & BBOX)
When `SelectFeatures` and strategies (Cluster or BBOX) are used the selection is
lost when zooming or pan the map. It also requires some effort to show a popup
when we are using Strategy.Cluster to display a list of features instead of one.
From a simpler approach this `FeaturePopups` control has evolved to a control
with more features and better customization capabilities, but retaining the
ability to plug and play. What opinion deserves?