Locate start/end points after pasting coordinates from clipboard

[otbutz]

I often paste the start and end coordinates directly into the web UI to check a route. This is a bit cumbersome at the moment as i need to press "Enter" for each of the two inputs.

To reproduce:

1. Open the web UI
2. Paste start coordinates e.g 52.519437,13.390477
3. Paste end coordinates e.g 52.041544,10.638686
4. No point is selected on the map. You have to press the Enter key for each input field to select the point on the map.