docs: make code examples consistent with map examples

[nsilvestri]

By default, many of the Playground maps use the 'bar' style
search control, but the code examples associated with the maps
do not specify the style. This ends up rendering a map with a
button-style control, which does not match the example maps.

This commit updates the documentation to specify style: 'bar'
whenever the associated example map is using a bar.

[smeijer]

Thanks! Appreciated.