Deal with multiple citekeys

[Bubblbu]

Citekeys managed by BBT are per default only unique within a single collection. Accessing your library with a citekey might therefore lead to mutliple results.

Suggested solution:

• Display individual retrieved items and let user confirm if the version is correct.

[Bubblbu]

Relevant discussion: retorquere/zotero-better-bibtex#1473

[Bubblbu]

The required feature to create bibliographies has been implemented in BBT.

To-do:

• Implement new endpoints
• Implement selection routine for users to choose between multiple items
• Wait for an official release of BBT 5.2.22 to publish the new features

[Bubblbu]

Code has been fixed to work with the most current build of BBT with the merge of this feature branch a803bbb

Now, wait for the release of 5.2.22 before merging into master