LED brightness UI (#520)

* Add nouislider

* Add LEDBrightnessComponent

* Move LEDBrightnessComponent to correct folder

* Add LED brightness page to side menu and device routes

* Add LEDBrightnessComponent to device index file

* Add LEDBrightnessComponent and NouisliderModule to shared module

* Remove ngModelChange from LEDBrightnessComponent until onChange is implemented

* Fix stylelint issue in led brightness component

* Add nouislider files to webpack.config.js

* Add adjusting LED brightness sliders with arrow keys

* Various tweaks to LEDBrightnessComponent

* Fix linting issues in LEDBrightnessComponent

* Allow "::ng-deep" pseudo element in stylelint config

* Add reading LED brightness settings from user configuration

* led-brightness save

* Move slider to its own wrapper component, add debounce for slider change events

* Small fixes to imports and exports of SliderWrapperComponent

* Fix slide component making change event when initial value is set

* Export SliderPips interface

* Fix LED Brightness slider pips

* Add support for value unit in SliderWrapperComponent

* Add a bit of space before LED brightness sliders so the slider handle doesn't go beyond the page in the min position

* Implement onDestroy, fix slider pip values and imports in LEDBrightnessComponent

* Fix imports, implement onDestroy in SliderWrapperComponent

* Move fix for slider pip value style to global styles file

* Reorder stylelint rules

packages/uhk-web/.angular-cli.json

@@ -21,11 +21,13 @@
       "prefix": "app",
       "styles": [
         "../node_modules/bootstrap/dist/css/bootstrap.min.css",
+        "../node_modules/nouislider/distribute/nouislider.min.css",
         "styles.scss"
       ],
       "scripts": [
         "../node_modules/bootstrap/dist/js/bootstrap.js",
-        "../node_modules/select2/dist/js/select2.full.js"
+        "../node_modules/select2/dist/js/select2.full.js",
+        "../node_modules/nouislider/distribute/nouislider.js"
       ],
       "environmentSource": "environments/environment.ts",
       "environments": {