Add a zoomToAllDevices button

Who can help with adding "zoom to all devices" button on the web app.

Or maybe give me some basic instructions on how it is done. I do not know extjs at all.

If you are interested in professional services, please contact sales or support.

I was looking for the community to help me with doing it.

I have the following 3 requests from my users ( I see the same requests multiple times here in the forums).
The reason why they requested it is because I have given the following app for them to download, and in that app all these 3 options exist.

https://play.google.com/store/apps/details?id=com.gennissi.gpstracking

1. A button to zoom back to all devices.
2. Have the address of the device next to each device.
3. A button to toggle the map from google with traffic to google without traffic. Or other maps.