- hyperlink all the column operators listed in the ORM tutorial common filter operato...

- hyperlink all the column operators listed in the ORM tutorial common filter operators section
- add language to MATCH explicitly stating this operator varies by backend and is not available
on SQLite, as the tutorial defaults to SQLite to start with, fix #3059
- on the actual match() documentation fix this up to be more accurate, list some example renderings
for different backends.  again mention SQLite not supported