add scroll to outer container for database / schema selector

Pull in snowflake + QP refactor + other stuff into 0.31

Previously linked to https://www.metabase.com/docs/latest/operations-guide/www.metabase.com/start/aws.html

Fix column title setting for non-number columns

Fix issue with multiple popovers in permissions grid

i18n(App) syntax errors found while translating

* match width to trigger

* tweak selected style

Fix Slack channel API performance issues

This adds a new request parameter to our Slack channels call to not
return channel members. This information is which Slack users are
currently in that channel. We don't use that information and it just
makes the response larger and more expensive to parse. This commit
also switches from a string response body to an InputStream
response. This allows us to avoid the overhead of the full response
being a string in memory before passing it to our JSON parser.

Fixes #8733

Snowflake support

Backport other minor tweaks from Snowflake PR [ci drivers]

Add Database to QP Store; SQL QP tweaks; test simplification

Specifically two tests with a between date filter are failing. Only
sometimes and only when running the full test suite. The guess right
now is it's grabbing an old connection with a previous test
report-timezone already preset on the connection. This commit flushes
the connection pool before running the test (only on Snowflake).

Before the date was not being casted (needed for other Drivers). Now
that it is being casted, the date is off by another day.

Doc: add current date example for parameter

Round :sd in tests [ci all]