feature request: allow bibtex item autocomplete when page numbers are used

[evamvid]

With biblatex, you can cite a specific page number by passing it as an option to the cite command, like

\autocite[34]{endsley2011}

However, if you type \autocite[34]{, setzer doesn't recognize it as a cite command the same way it does \autocite{, so it doesn't offer the autocomplete options it normally would

[cvfosammmm]

This would be nice. It would be difficult to implement within the current framework though, so one more reason for a rewrite of the autocomplete module.