Add equivalent style to place=square as in leisure=park

[patepelo]

• Font could be green and white as well
• We could add an equivalent (not circled) icon

[RedAuburn]

squares aren't always grassy, in London the majority are concrete, so green wouldn't make sense IMO.
i'll try adding an outline to the standard grey and post screenshots

[patepelo]

OK. Just grey should work, at least is much better. And you're right that squares tend to be grey.

[RedAuburn]

also we decided against an icon in #6013 :)

PR with photos here:
#6322

[patepelo]

It looks much better. Thank you for taking it into account. I think it makes a great difference.