More wide use of AUTO_LANGUAGE in SPARQL queries

[egonw]

Fixes #1

Description

Uses AUTO_LANGUAGE more often in SPARQL queries allowing the WDQS to pick up the language used in the web browser.

Caveats

It does not solve picking the language when rdfs:label is used in combination with FILTER lang().

Check any of the following which apply:

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
  • I have made corresponding changes to the documentation
• This change requires new dependencies (please list)

Testing

This patch touches on a lot of SPARQL queries, in the following aspects:

404-chemical
author
author-curation
author-index.html
authors
award
award-curation
chemical
chemical-class
chemical-element
clinical-trial
clinical-trial-index
complex
countries
country
country-topic
dataset
disease
event
event-series
location
location-topic
organization
organizations
project
property
publisher
series
software
sponsor
topic
use
venue
venues
work
works

Checklist

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have not used code from external sources without attribution
• I have considered accessibility in my implementation
• There are no remaining debug statements (print, console.log, ...)