* WIP: Use data frames in explore

* Explore: everything seems to be working again

* Reworked ResultProcessor tests

* Fixed unit test

* Add some typings and comments

without this lock there is a race condition between the scheduler and job processing.

Adding pause/resume buttons and pause on scroll to prevent new rows messing with the scroll position.

* Performance/Webpack: Introduces more aggressive code-splitting and other perf improvements
- Introduces dynamic imports for built-in plugins
- Uses dynamic imports for various packages (rst2html, brace)
- Introduces route-based dynamic imports
- Splits angular and moment into separate bundles

* WIP: inital POC

* Wip: Moving forward

* Wip

* Refactor: Makes loading indicator work for Prometheus

* Refactor: Reverts prom observable queries because they did not work for multiple targets

* Refactor: Transforms all epics into thunks

* Fix: Fixes scanning

* Fix: Fixes so that Instant and TimeSeries Prom query loads in parallel

* Fix: Fixes negation logic error

* Wip: Introduces PanelData as a carries for query responses

* Refactor: Makes errors work again

* Refactor: Simplifies code somewhat and removes comments

* Tests: Fixes broken tests

* Fix query latency

* Remove unused code

* Adding DashboardPicker component

* fix prop names

* fix prop names pt2

* ErrorHandling: Fixed Prometheus query editor error and added error boundary

* Update public/app/core/components/ErrorBoundary/ErrorBoundary.tsx

Co-Authored-By: kay delaney <45561153+kaydelaney@users.noreply.github.com>

* Fixed ts error

(cherry picked from commit be2e2330f5c1f92082841d7eb13c5583143963a4)

* add appending utility

* add appending utility

* update comment

* rename to mutable

* move mutable functions out of DataFrameHelper

* move mutable functions out of DataFrameHelper

* move mutable functions out of DataFrameHelper

* turn DataFrameHelper into FieldCache

* guess time from name

* graph the numbers

* return the timeField, not just the index

* just warn on duplicate field names

* only use a parser if the input is a string

* append init all fields to the same length

* typo

* only parse string if value is a string

* DataFrame: test fixes

* Switch to null for missing values

* Fixed tests

* Enterprise: add dependencies for upcoming features

See enterprise issues

* Editor: Fixes issue where only entire lines were being copied
Closes #18768

* Simplifies onCopy handler and factors out logic for easier testing
Also adds tests to verify behaviour

* Explore: Fixed query status issue, fixes #18778

* Added test for QueryStatus

* Explore: clear results when you change datasource

* Explore: Clear results on data source change, and fix query hints issue

* Clear results on clear all

* Prometheus: Update logic of when to re-check query hints

* Build: Removed typescript checking from dev bundler

- when switching branches and trying out features, TS checking and bundling are eating up a lot
of CPU
- most of us are using an editor with typechecking support
- this commit removes type checking from the dev bundler
- we still have type checking enabled as a precommit hook and as part of
the prod bundler

* Adds new npm script: start:noTsCheck

* API Tutorial: Improve content and readability

- Simplified the introductory paragraphs.
- Rewrote the descriptions and steps to improve readability.

* Updated topic as discussed in the PR

- Corrected the typo from "Graphana" to "Grafana".
- Rewritten the note as suggested by reviewers and to avoid passive voice.

Please review and share your thoughts.

Fixes #18533

To recreate the bug described in the original issue in the simplest possible way:

1. Setup dashboard with a single panel and repeat it using variables
2. Set the dashboard refresh to 5s
3. Hover over repeated panel during the refresh

What happened there?
When panels are repeated every time the dashboard is refreshed or variables change the repeated PanelModels are recreated. In https://github.com/grafana/grafana/blob/master/public/app/features/dashboard/state/DashboardModel.ts#L322 the models are removed from dashboard panel's model property what makes the dashboard re-render with source panel only, and then back again with the repeated panels when models are re-created. This means creating new DashboardPanel components. But when the repeated PanelModels are removed, they are not destroyed what results in a behaviour described in #18533.

This is a quick fix for this issue. Ideally I think we should use some cache and update the repeated PanelModels when the refresh or variables change trigger re-render, instead of re-creating those every time. I don't want to do this ATM as the logic around repeating panels is quite complex and require some <3.

* Singlestat: Various fixes to singlestat and DataFrame

* removed comment

* Explore: Fixed issue in PanelQuery state arround cancellation

* Added unit test

* Fixed typescript issues in test

Closes #18597

* update changelog

* update latest.json to latest stable version

* Changes brace-insertion behavior to be less annoying

* Removes use of braces plugin

* Revert "Removes use of braces plugin"

This reverts commit 4cf4a6073bb77ec7ed569c6917db9bbf2b3fd176.