* Do not override default `hide` value of variables

Some variables like `constant` are configured to
be hidden by default and this setting must be
treated with respect.

* make textBox variable visible by default

Fixes #16695

* check for running

* split out panel state

* adding test file

* remove bad test

Fixes #1690 

navigation between pages in app plugin is slow, due to use of non angular native promise

Fixes #16672

merged DataQueryOptions + DataRequestInfo info: DataQueryRequest

* move queryRunner to panelModel
* Added interval back as prop, not used yet
* PanelQueryRunner: Refactoring, added getQueryRunner to PanelModel
* PanelQueryRunner: interpolatel min interval

* Docs: initial backend plugins development guide

* Some tweaks

* more tweaks

* chore: docs changes to backend plugins guide

* chore: docs tweaks to backend plugins guide

* use timeInfo from request

* move timeInfo to DataRequestInfo

* move queryRunner to panelModel

* remove isEditing from PanelChrome

* move listener to QueriesTab

* Fixed issue with isFirstLoad set to false before loading state is Done

* QueryRunner: Fixed issue with error and delayed loading state indication

* Anoter fix to issues with multiple setState calls in observable callbacks

Moves query execution logic to PanelQueryRunner and structures PanelChrome so it subscribes to the query results rather than necessarily controlling their execution.

The iteration order over maps is not specified and is not guaranteed
to be the same from one iteration to the next. If a map entry that
has not yet been reached is removed during iteration, the corresponding
iteration value will not be produced. If a map entry is created during
iteration, that entry may be produced during the iteration or may be skipped.
The choice may vary for each entry created and from one iteration to
the next. If the map is nil, the number of iterations is 0.

https://golang.org/ref/spec#For_range

* removed unsused grafana-icon classes, replaced grafana-icons with gicons

* replaced old dashboard and datasource icons with gicon, fixed so icons on plugin list are shown

* removed unsused grafana-icon classes, replaced grafana-icons with gicons

* replaced old dashboard and datasource icons with gicon, fixed so icons on plugin list are shown

* replaced fontawesome cog, eye, link and edit with gicons

* updated snapshot

* fixed color of cog in dashboard nav, removed icons from buttons, ran preitterier on some files

* changed opacity on getting started icons and fixed getting started button

* .5 -> 0.5 fix for prettier

* Search: Fixes search limits and adds a page parameter

This adds a page parameter to search api without adding
any major breaking change.

It does at an api validation error when trying to use
a limit beyond 5000. This is a breaking change. We could
remove this and have it only in the docs and describe that this
is a limit that grafana will apply silently.

Fixes #16049

* Fix: Corrected wrong array slice change

* Docs: minor docs fix

* Search: fixed folder tests

* Fixed: Moved limit to correct inner query

* Search: moving limit check and page check

* Search: limit in handler is no longer needed

* fix: Lock version of dependencies

* fix: Lock version of devDependencies

* fix: Lock down grafana/ui npm versions + regenerate lockfile

* fix: Back some versions i tried to bump

* fix: Bump react and react-dom to latest

* chore: Remove types/react from resolutions

* fix: Lock eventemitter3 version in package.json

bmizerany is old and unsupported. so we are replacing it
with stretchr which is an drop in replacement and something
we want to use more in Grafana.

* pass query request/response to panel plugins

* rename finishTime to endTime

* move QueryResponseData to a sub variable

* rename to PanelData

* make data not optional

* make data not optional

* missing optional

Fixes: #16277

* Chore: refactor auth proxy

Introduced the helper struct for auth_proxy middleware.
Added couple unit-tests, but it seems "integration" tests already cover
most of the code paths.

Although it might be good idea to test every bit of it, hm.
Haven't refactored the extraction of the header logic that much

Fixes #16147

* Fix: make linters happy

- guide shamelessly stolen from prometheus/prometheus
- updates local interface of oauth exchange
- updates local impl of hclogger
- bump jaeger client version

closes #16088

Heatmap: Fixed auto decimals when bucket name is not number but contains dots, fixes #13019 (#16609)

we still use gometalinter for goconst since it doesn't 
report errors for duplicated in test files

* Added RefreshButton

* Added RefreshSelect

* Added RefreshSelectButton

* Added RefreshPicker

* Removed the magic string Paused

* Minor style changes and using Off instead of Pause

* Added HeadlessSelect

* Added HeadlessSelect story

* Added SelectButton

* Removed RefreshSelectButton

* Added TimePicker and moved ClickOutsideWrapper to ui/components

* Added TimePickerPopOver

* Added react-calendar

* Missed yarn lock file

* Added inputs to popover

* Added TimePicker and RefreshPicker to DashNav

* Moved TimePicker and RefreshPicker to app/core

* Added react-calendar to app and removed from ui/components

* Fixed PopOver onClick

* Moved everything back to ui components because of typings problems

* Exporing RefreshPicker and TimePicker

* Added Apply and inputs

* Added typings

* Added TimePickerInput and logic

* Fixed parsing of string to Moments

* Fixed range string

* Styling and connecting the calendars and inputs

* Changed Calendar styling

* Added backward forward and zoom

* Fixed responsive styles

* Moved TimePicker and RefreshPicker into app core

* Renamed menuIsOpen to isOpen

* Changed from className={} to className=""

* Moved Popover to TimePickerOptionGroup

* Renamed all PopOver to Popover

* Renamed popOver to popover and some minor refactorings

* Renamed files with git mv

* Added ButtonSelect and refactored RefreshPicker

* Refactored TimePicker to use new ButtonSelect

* Removed HeadlessSelect as suggested

* fix: Fix typings and misc errors after rebase

* wip: Enable time picker on dashboard and add tooltip

* Merge branch 'master' into hugoh/new-timepicker-and-unified-component

# Conflicts:
#	packages/grafana-ui/package.json
#	packages/grafana-ui/src/components/Input/Input.test.tsx
#	packages/grafana-ui/src/components/Input/Input.tsx
#	packages/grafana-ui/src/utils/validate.ts
#	public/app/features/dashboard/panel_editor/QueryOptions.tsx
#	yarn.lock

* fix: Snapshot update

* Move TimePicker default options into the TimePicker as statics, pass the tooltipContent down the line when wanted and wrap the button in a tooltip element

* fix: Override internal state prop if we provide one in a prop

* Updated snapshots

* Let dashnav control refreshPicker state

* feat: Add a stringToMs function

* wip: RefreshPicker

* wip: Move RefreshPicker to @grafana/ui

* wip: Move TimePicker to @grafana/ui

* wip: Remove comments

* wip: Add refreshPicker to explore

* wip: Use default intervals if the prop is missing

* wip: Nicer way of setting defaults

* fix: Control the select component

* wip: Add onMoveForward/onMoveBack

* Remove code related to the new time picker and refresh picker from dashnav

* Fix: Typings after merge

* chore: Minor fix after merge

* chore: Remove _.map usage

* chore: Moved refresh-picker logic out of the refresh picker since it will work a little differently in explore and dashboards until we have replaced the TimeSrv

* feat: Add an Interval component to @grafana/ui

* chore: Remove intervalId from redux state and move setInterval logic from ExploreToolbar to its own Interval component

* feat: Add refreshInterval to Explore's URL state

* feat: Pick up refreshInterval from url on page load

* fix: Set default refreshInterval when no value can be retained from URL

* fix: Update test initial state with refreshInterval

* fix: Handle URLs before RefreshPicker

* fix: Move RefreshInterval to url position 3 since the segments can take multiple positions

* fix: A better way of detecting urls without RefreshInterval in Explore

* chore: Some Explore typings

* fix: Attach refresh picker to interval picker

* chore: Sass fix for refresh button border radius

* fix: Remove refreshInterval from URL

* fix: Intervals now start when previous interval is finished

* fix: Use clearTimeout instead of clearInterval

* fix: Make sure there's a delay set before adding a timeout when we have slow explore queries

* wip: Add refresh picker to dashboard

* feat: Add util for removing keys with empty values

* feat: RefreshPicker in dashboards and tmp rem out old RefreshPicker

* fix: Remove the jumpy:ness in the refreshpicker

* Changed placement and made it hide when your in dashboard settings

* chore: Move logic related to refresh picker out of DashNav to its own component

* feat: Add tooltip to refreshpicker

* fix: Fix bug with refreshpicker not updating when setting to 'off'

* fix: Make it possible to override refresh intervals using the dashboard intervals

* chore: Change name of Interval to SetInterval to align with ecmascripts naming since its basically the same but declarative and async

* fix: Use default intervals when auto refresh is empty in dashboard settings

* fix: Hide time/interval picker when hidden is true on the model, such as on the home dashboard

* fix: Interval picker will have to handle location changes since timeSrv wont

* RefreshPicker: Refactoring refresh picker

* RefreshPicker: minor refactoring

* fix label handling

* SEARCH() results could have multiple namespace, remove from legend

* divide GetMetricStatistics related code

* divide GetMetricData related code

* divide parseGetMetricDataResponse()

* divide parseGetMetricDataQuery()

* divide test code

* add test for GetMetricData

* add test for GetMetricData parse response

* fix bug of terminating gap

* fix gofmt