"Discover Wikibase manifests..." button

[trnstlntk]

OpenRefine 3.6 comes with a very handy new Discover services... button in the reconciliation dialog that helps people discover reconciliation services (clicking the button will bring folks to https://reconciliation-api.github.io/testbench/#/ which lists many of these services).

Similarly, it would be great (and a uniform pattern) if we had a similar Discover Wikibase manifests... button in the Wikibase extension's 'Select Wikibase instance' dialog window.

When clicking on that new button, folks could be led to https://github.com/OpenRefine/wikibase-manifests. This could also be an encouragement for more Wikibase maintainers to publish their manifests there.

[trnstlntk]

I actually think this was an idea from @lozanaross - credit where credit is due 😇🥇

[wetneb]

Just a note about the text on the button: I would find it more appealing to have something like "Discover Wikibase instances…" or "Discover Wikibases…" because the manifest is just a rather technical thing.

[lozanaross]

I vote for "Discover Wikibase instances..." for consistency with the title of the dialog, which is "Select Wikibase instance"

[elebitzero]

I can work on this tomorrow.