Fix ad blocker problem with accessibility.cloud widget

[opyh]

For some reason, the current implementation on staging does not show the accessibility.cloud widget with the EFF privacy filter enabled. This should work.

[1000miles]

For reference infos please follow the past discussion on the PR #620 and put further discussions here. :)

[1000miles]

As bespoken with @opyh here is an example node that comes with the initial data set and contain the accessibility.cloud widget which we can use for reviews.

Development:
http://0.0.0.0:3000/nodes/429735547

Staging:
https://staging.wheelmap.org/nodes/429735547

Production:
https://wheelmap.org/nodes/429735547