* updated screenshots in explore index page
* add advanced data picker option to jaeger, tempo, and zipkin data source docs
* Revert changes to data source files
Reverting changes to data source files to maintain scope of this PR as just updating Explore. Changes to other areas where DS picker has been updated will be addressed on another PR when that scope has been decided.
* Fixed indentation and made advanced ds picker language more robust
Isabel
0c072770ca