Update script to make it use OpsGenie's REST API

adding support for token-based slack file.upload API call for posting images to slack

* colorpicker: initial picker with predefined palette and spectrum

* colorpicker: highlight selected color

* colorpicker: add onChange() callback

* colorpicker: replace singlestat picker by new one

* colorpicker: style tweak

* colorpicker: parse color on input blur

* colorpicker: sort palette by hue and lightness

* colorpicker: refactor, move colors sorting to 'app/core/utils/colors'

* tech: colorpicker - fix linter errors

* colorpicker: convert to React components

* colorpicker: fix spectrum import after moving to webpack

* colorpicker: minor refactor

* colorpicker: initial series color picker

* colorpicker: fix tests error

* styling changes and some text changes

* styling changes

* fixing checkboxes

* deleted old file, fixed checkboxes

* minor change

The script is making API calls to the deprecated OpsGenie Web API, we updated the script to make it use new OpsGenie's REST API.

redesigned dashboard links settingd, fixed a misspelling in rows and added fixed width to buttons (#9397)

Merge branch 'update-alert-lists' of https://github.com/Ijin08/grafana into Ijin08-update-alert-lists