In effect, this is a combination of two of the previous pickers:
the location picker, and the editable string picker.
This required quite a significant rework of how the tilemap places its children.
Currently it's only used in special node editing.
I plan to add its use in many other places too though.
These were very shoddily put together!
It seems the person who made them never really tried building
the editors or the tests.
Also included here are a couple of minor source changes that are needed
to make the project files build.
