(cherry picked from commit 07c340cf)

* [sql lab] improve table name detection in free form SQL

* flake

* Addressing comments

(cherry picked from commit 5a40f717)

* Adding extraOverrides to line chart

* Updating extraOverrides to fit with more cases

* Moving extraOverrides to index.js

* Removing webpack-merge in package.json

* Fixing metrics control clearing metric

(cherry picked from commit e6194051)

(cherry picked from commit 3e076cb6)

(cherry picked from commit 48431ab5)

(cherry picked from commit 60d5f89f)

(cherry picked from commit 57289462)

(cherry picked from commit b0f7f51a)

* Update datasource.py

* Update datasource.py

(cherry picked from commit c771625f)

(cherry picked from commit ead3d481)

(cherry picked from commit 0782e831)

(cherry picked from commit a6d48d40)

(cherry picked from commit 05be8661)

(cherry picked from commit 7f3c145b)

(cherry picked from commit fc1770f7)

(cherry picked from commit cc58f0e6)

(cherry picked from commit 6a4d507a)

(cherry picked from commit 6b0ab210)

* added more functionalities for query context and object.

* fixed cache logic

* added default value for groupby

* updated comments and removed print

(cherry picked from commit d5b9795f)

This PR removes the iteration over charts, dashboards and saved queries to create tags in the original migration, leaving only the logic to create the tags and the tagged objects tables.
Tested locally by running `superset db downgrade` to revert to the previous migration and then running `superset db upgrade` to the current version.

(cherry picked from commit e47a1b28)

* Remove Cypress from package.json

I'm building some Docker images these days and realizing just how big
the Cypress package is. Looks like its ~500mb or so.

I prefer adding it as needed only as opposed to having to play tricks as
in `npm ci && rm node_modules/cypress`

* Pin cypress version

* Add script entry install-cypress

* bump cypress and fix ts-jest warning

(cherry picked from commit 8f2ce756)

(cherry picked from commit 50264011)

* Fix deck.gl viz

* Fix more form data

* Fix a few more places

* Fix unit tests

(cherry picked from commit e0feec91)

In superset-ui 0.8.0, we used bignumber.js to transform numbers in chartProps' payload from plain 64-bit floats to BigNumber instances. This causes a number of charts to render incorrectly when comparison functions in the rendering algorithms operate on BigNumber objects instead of floats. This PR uses the preTransformProps step in SuperChart to transform BigNumber instances back to floats so charts can render properly.

(cherry picked from commit 73cdb37f)

Seeing an intermittent repro of the `current` nodes of the sql editor and south pane refs returning null. Adding a safety check for both nodes.

(cherry picked from commit c04c0cd8)

* Fix database typeahead in SQL Lab

* Fix lint

* Use string interpolation

(cherry picked from commit 25ec00b3)

* Address tooltip's disappearance and stickiness

Nvd3 attaches tooltips to the body of the dom, not the chart the tooltip is meant fo. On hover, it sets their opacity to 1. In order to address both their stickiness when chart reloads (PR #6805) and thier disappearance on scroll in dashboards (PR #6852), we introduce a shouldRemove parameter to `hideTooltips` and only remove them befor chart reloads. For the scroll events triggered on dashboards, we only hide the tooltips by setting their opacity to 0. When they get hovered over again, nvd3 sets their opacity to 1 which causes them to reappear.

* adding a comment about the shouldRemove parameter

(cherry picked from commit b035185b1c5c4f4332bfc8c9f748166f8d43151f)

(cherry picked from commit 3f96b0c5)

* Add show metadata button back to the explore view

- Add the show metadta button, accidentally removed from PR #6046, back to the explore view
- Remove dead code that is no longer reachable from DataSourceModal.jsx.

* Adding additional code back to make the button function and remove more dead code.

(cherry picked from commit f8cf0fb7)