Fixes #16448

* aligned headings on profile, admin and configuration pages

* fixed snapshot

Fixes #16373

Replaces session storage in auth_proxy middleware with remote cache

Fixes #15161

This fixes an error that was thrown when one or several queries
was disabled using the mixed datasource.

Fixes #12977

* replaced colors for headingColor, link and linkDisabled with colors from grayscale, replaced colors for linkDisabled and linkHover with colors from grayscale, changed color for sha-modal-in-text to text-color-empahises

* fixed snapshot

Fixes #16439

Upgrades to webpack & css optimization caused changes
in production build that removed the left brand
gradient.

Fixes #16430

See https://github.com/grafana/grafana/pull/16200#issuecomment-479370356
Thanks @xlson

Ref #16200

* added new variables for height in theme, added height to gui button large, replaced add gicon with regular gicon, replaced + with gicon, changed button display to flex

* set fixed height to large button, removed xlarge button and replaced with large button

* removed button-mini and replaced with button-small, set fixed height to default button and button-small

* fixed padding for default and large button, fixed height for navbar button, fixed snapshots

* fixed padding and margin on navbar buttons

* gave special height to login btn-primary

* readded btn-mini class with same styling as btn-small and a deprecated notice

* fixed add panel widget buttons

Fixes #16359

LED cell width needs to be integers

Override decimals did not fully override auto scaling logic

Fixes #16068

Fixes bugs introduced in PR #14716 and #15146 also restores unit tests that where lost in the
move from kbn units to @grafana/ui units

Fixes #16068
Fixes #16373

The video on youtube got removed.

Fixes #16302

Fixed margin issue that was not accounted for in width calc (#16419)

* WIP: began work on adding title support to bar gauge

* Feat: BarGauge progress

* wip: trying improve text size handling in bar gauge

* BarGauge: progress on title & value auto sizing

* BarGauge: more auto size handling

* bargauge: minor tweaks

* Added tests

* Refactoring: BarGauge refactoring moving css generation to seperate functions and adding some basic tests

* Refactoring VizRepeater and more

* Fix: updated and fixed tests

Fixes #16377

Only interpolate string parameters

Fixes #16367

Increase timeout when waiting for datasource toggleEditorMode check 

Fixes  #16393

* wip: began work off removing meta and pluginExports from DataSourceApi interface

* WIP: changing how plugins are exports and loaded

* Down the refactoring rabit hole that keeps expanding

* TestData now returns DataSourcePlugin

* Refactoring: fixed app config page loading, type renamings and more typings

* Refactor: Correct casing on DatasourceStatus => DataSourceStatus

Fixes so it's possible to create new notification channel and providing uid.
Fixes better error/result handling when updating a notifcation channel.

Fixes #16372
Ref #16219 #16012

Closes #16334

Re-render panel when date and string options are updated 

Fixes #16375

* chore: Bump Typescript to 3.4.1

* chore: Bump babel-jest, jest, ts-jest

* fix: Fix tests after typescript upgrade by disabling some typings

* chore: noImplicitAny

* chore: Bump typescript in @grafana/ui