* Upgrade styled-components to 3.3.3
* Update test style snapshots
The upgrade seems to have affected the order in which the css classes
are serialized in the snapshot. The css rules within these classes look
identical.
* Update Kibana's yarn.lock
* Update kbn-i18n lockfile in anticipation of #20301
* use uiSettingsClient instead of angular config service
* replace timefilter service with singleton
* remove all other uses of timefilter service, get timefilter singleton working
* remove Private from brush event
* globalState
* fix timefilter jest test
* clean up rebase artifacts
* lint errors
* another lint error
* fix broken functional test _shared_links
* fix broken mocha test doc.js
* fix service load order breaking status page
* remove Provider from change_time_filter
* another round of mocha test updates
* convert create_brush_handler test to jest
* fix kbnGlobalTimepicker toogle mocha test
* remove _root_search_source - removed in another PR and somehow I added it back during rebase
* better comments around Object.assign and proper js-docs format
* use so listerners get cleaned up when scope is destroyed
* listen to correct timefilter update event
* update APM to use timefilter singleton
* update angular scope when timefilter changes
* fix APM jest test
* add listenAndDigestAsync to listen.js
* fix apm breadcrumbs jest test
* move diffTime and diffInterval into timefilter
* pass mode to updateFilter to resolve functional test failure
* call registerTimefilterWithGlobalState from APM application
* remove rootScope from kbn_global_timepicker
* use to subscribe to timefilter in cases where results need to happen in digest async
* spalger review changes
* ensure monitoring timefilter callbacks are executed inside evalAsync
* remove unneeded evalAsync calls around setTime
* [kuery] Remove `byName` dependency
* Remove $http from kuery
* Fix test
* Add request headers
* Replace byName with getFieldByName; add isFilterable
* Replace Angular mock with static mock
* Update index pattern for query bar
* manually attach format.convert method to field
* Use KBN_FIELD_TYPES to determine isFilterable
* Bump yarn.lock file
* Add kfetch (Kibana fetch)
* Moved `getFromLegacyIndexPattern` to static index pattern functions
* Fix tests
* Mock out kfetch
* Move value formatting from getRangeScript to buildRangeFilter
* Remove getFieldByName (over abstraction)
* Split kfetch options into two
