* Improve Filter Box

* layout tweaks

* add kuaishou

* Bump requirements

* Fix setup.py for email reports

* WIP, fixing padding

* Remove testing code

The "altered" tag in the explore view shows up more often than it
should. By treating null, [] {}, undefined as identical will help reporting
only the differences that matter.

- Clean up css and html of the sql editor button area (removing unused styles)
- Restyle the button area and the resizer to be more like the one proposed in issue 6565

* resolved merge conflicts with upstream

* changed the key in a spot I missed

* linting

* refactored my code out into a function

* update util

* simplified the code logic

* cleaned up code

- redirect explore url with r parameter
- redirect to relative path

closes #6556

delete the 'null,' in messages.json,
so that word can be translate in js.

Refactored deprecated functionalities:
  - Used 'celery worker' command instead of 'superset worker' which is
    deprecated since 0.26.0
  - Used 'gunicorn' command instead of 'superset runserver'

* Finish move to babel 7

* Bump jest to 23.6.0

* Address comments

As I needed to downgrade from db migration 0b1f1ab473c0, I realized I
needed to use batch_op against SQLLite.

Changed margin for the slices description in dashboard view, previously the margin was 5px for all the sides but for improve the view just apply margin for top and bottom.

* fix Oracle engine specs for dates issue #6572

* fix Oracle engine specs for dates issue #6572

* fix Oracle engine specs for dates issue #6572, removing comment

* ng a trailing space

* [design] use angle icons instead of carets for expandable panels

Also moving to the right to conform to the material design specs

* Fix cypress test

* Fix: updated required cryptography version to 2.4.2 to resolve #6509

* Fix: updated cryptography version to 2.4.2 to resolve #6509

* Fix: updated cryptography version to 2.4.2 to resolve #6509

* Revert "Fix: updated required cryptography version to 2.4.2 to resolve #6509"

This reverts commit b57b08c8e578d814ac0c6a696afe9ee34ef1e70a.

* Fix: updated cryptography version to 2.4.2

* [refactor] moving some datasource-related code to the frontend

* fix js tests

* fix tests

* fix test

* Allow running multiple statements from SQL Lab

* fix tests

* More tests

* merge heads

* fix heads

* Make boto3 installation optional

* pylinting

* [SIP-14] remove dependency on yarn in favor of npm

Find more details here
https://github.com/apache/incubator-superset/issues/6217

* Add core-js to dev deps

* lint

* fix cypress

* break down cypress_build.sh

* fix cypress

* Use 'npm ci' in place of 'npm install'

* Bump npm req to >=6.5.0

* Enforcing  npm@'>=6.5.0'

* Using latest lts of nvm

* Make cache settings global

* remove uneeded 'npm run test' as 'npm run cover' takes care of that

* Prefix with 'time'

* Trying to upgrade babel-eslint instead of downgrading

* upgrading babel-polyfill to '@babel/polyfill'

* Moving to babel 7

* remove unused packages

* Make owner a m2m relation on datasources

* Fix pylint

* Make migration work in mysql & sqlite

* minor, auto tune debug mode when use flask_env

* update changes

When a URL gets too long (usually happens with controls that allow
free form text), it creates an array of bugs.
* bug when creating a short URL, because the POST request's referrer
field is too long
* a bug when saving a chart (when the modal shows up) also because of
the referrer being too long

Some work has been done in the past to mitigate this, and I'm unclear if
it's some sort of regression because of the Flask upgrade or some
browser change, or whether these bugs have always been around.

This is a request for comment on an approach that works. Let me know if
you can think of better ideas as to how to manage this.

My current solution looks for 8000+ characters URLs and shrinks them to
only `/superset/explore/?URL_IS_TOO_LONG_TO_SHARE&form_data=...` and we
only keep the formData keys for `datasource` and `viz_type`. Not super
elegant but does the trick.