* Remove graph_types from DB.
This is silly since defining them in definitions.inc.php already does the same thing.
Adds missing ones in definitions.inc.php and rewrites others since I already wrote them before I realized they were duplicates.
* remove dead table
* Remove graph_types inserts from schema files.
* update db_schema.yaml
* initial work to standardise collation
* more updates
* final bits for collation update (famous last words)
* Rename 165.sql to 166.sql
* Update schema version inside 166.sql
* moved schema file 166->171