Enhancement: Allow coordinates to be populated by click on map

[RobJN]

When you create a diary post you can add lat/lon values manually but you are also presented with an option (link text) to “use map”. This then displays a small map which you can click to populate the coordinate values.

Can the same logic be used when creating a microcosm group?

[openbrian]

New events also have map-input.

[openbrian]

fixed by b3877bb

[openbrian]

@RobJN I just fixed and pushed this. Please give it 20 minutes to appear on the dev site, assuming all tests pass in Travis. If you care about that see the bottom of the PR openstreetmap#2390