* Show info tooltip from cards on dashboards

Addresses https://github.com/metabase/metabase/issues/3980

* Fix bug where description showed up on chart labels

* Fix indentation

* Hide info description unless hovering on card

* Fix merge error

* Use existing CSS classes for hover

Also: Implement support for scalar cards

Make site-url a normal setting and set automatically via middleware

Fix time filtering

Don't return hidden tables as autocomplete suggestions

* scroll add to dash content

* clean up

Fix display of MinRowsError on dashboards

* jest setup and simple tests for Button

* add jest to CI

* cleanup

* make eslint play nice

Show FKs fields for ID filter widgets

Allow to reduce webpack-dev-server stats noise

Option for watching webpack-dev-server work progress

Make sure encrypted DB details are de-CLOBbed before decrypting

Fix row chart sort order

Fixed link to the "segments and metrics" section of the admin guide.

Native/SQL editor improvements

Add dox about using new DB details encryption [ci skip]

Misc visualization fixes and ehancements

Visualization settings refactor

Hide variables pane when starting new query

ConstrainToScreen function/component

Make sure you put blank lines before bullet point lists! [ci skip]

Optional symmetric encryption for DB details (AES256 CBC + HMAC SHA512)