fix issue where database create/update was still trying to call the db_form_input endpoint which we removed recently.

provide information about our `:engines` through our main MetabaseSettings which simplifies some things and removes the need for a /api/database/form_input endpoint.

apply the same basic logic and styling to the Data Reference section for FK connections that we just added to the object details page.

tighten up the styling on the connection "via" span and update logic to only show the path of the FK relationship is needed (aka if there are multiple references from the same table)

add a function in our schema metadata lib for `foreignKeyCountsByOriginTable` which counts the occurrences of FK relationships by the origin table they come from.  this allows us to know if a given origin table is represented multiple times in a list of FKs.

provide an indication of the FK field that was used to determine the connection on object details relationships pane.

Mostly working conversion of database edit/create to React. Also incorporate some of the UX improvements (delete confirm, animating FormMessage)

add back the ssl and non-ssl database connection try logic which went missing when we moved setup over to react/redux.  fixes #1304