Fix concatenation of translation strings

[pedro-mendonca]

Use createInterpolateElement to make complete translation strings without concatenation.

Fixes #553

[creativecoder]

Thanks for addressing this translation bug!

My understanding is that the standard way to solve this is to use [sprintf from the @wordpress/i18n package], and use placeholders for any markup within the string. (https://github.com/WordPress/gutenberg/tree/trunk/packages/i18n#sprintf).

[creativecoder]

My understanding is that the standard way to solve this is to use [sprintf from the @wordpress/i18n package]

Now I see from #553 that you already tried that! Looks like using createInterpolateElement is the pattern that's used in Gutenberg for this situation.

[creativecoder]

I can see the links correctly generated in wp-admin. Thanks for addressing this.

[creativecoder]

Using an absolute path like this will break when using non-standard hosting configurations, like putting core files in a subdirectory, or subdirectory multisite installations.

But that's not a new problem with this PR.

[pedro-mendonca]

I've kept the text and link structure, only improved the i18n of the string.
Feel free to add any changes to the links in the PR.

[creativecoder]

Thanks, I think we should handle the link structure change separately from this PR.

[pbking]

This view has been depreciated and likely to be removed on the next release. However the work is already done and might be helpful as prior art somewhere. Bringing this in now.