Support conditionally clearing map layers on TIME_CHANGED event

[philip-khaisman]

Right now in View.js if a TIME_CHANGED event is received from the data source we clear map layers. Connecting data synchronizers and data sources results in the time range changing on the data source which publishes the message. This is not ideal when starting playback after a pause. If I'm pausing a visualization it could be because i want to inspect the state at which i paused it. And I might need to reference that map feature after i resume playback

Not sure if this should go into the osh or botts osh-js repo. I thought osh but tracking here for visibility

[philip-khaisman]

Hm. I wonder if I can pause and play without having to disconnect and reconnect

[philip-khaisman]

Mathieu said there might be an example in showcase dev

[philip-khaisman]

https://opensensorhub.github.io/osh-js/dev/showcase-dev/