[editor] Replace pp business string with place string

[meenbeese]

Is this the right approach? Please take a look.
We might not even need the [plagepage_add_business_button] string anymore.

Closes #4321

[biodranik]

"Add business" looks somehow better for buildings. I think an even better solution could be to promote map editing and make these add buttons more discoverable, maybe located in other places, even on the bottom Place Page panel.

[meenbeese]

I don't really agree that "Add business" looks better. I think the separation of place and business adds unnecessary confusion for users as stated in the original issue.

Maybe we can improve the wording altogether if none of them are particularly good? Wdyt about some that I came up with:

1. Add new location to OpenStreetMap
2. Contribute a new spot to OpenStreetMap
3. Register a new place on OpenStreetMap
4. Introduce a new place to OpenStreetMap

[biodranik]

The motivation beyond "Add business" was for non-geek users who may never discover a long-tap. It is clear for them what it means to "Add business", and not as clear "Add a place to OSM".

One of our goals is to educate our users, no doubt, but another goal is to motivate users to update the map and contribute to OSM. It's better to keep the whole picture in mind when redesigning this UX. If we had real statistics about clicks, edits, and following OSM registrations, then it would be easier. But we don't have it...

I'm open to experimenting and improvements that are targeting our grandparents, not geeks. OM should be easy to use for anyone. It would be great to speak with non-experienced users and see what would be clearer for them.