Angular 6 (#556)

* upgrade to angular 6 (with rxjs-compat)

* fix tests

* fix test scripts

* upgrade rxjs to 6.0

* remove rxjs-compat layer

* update unit tests

* restore tests

* context-menu transparent backdrop

* upgrade libs

* changed snackbar locator

* locator as class

* remove locator element reference

* snackbar locators

* wait for snackbar before executing the action button

* expect cdk-overlay before mat-menu-panel condition

* update libs

karma.conf.js

@@ -4,13 +4,13 @@
 module.exports = function (config) {
   config.set({
     basePath: '',
-    frameworks: ['jasmine', '@angular/cli'],
+    frameworks: ['jasmine', '@angular-devkit/build-angular'],
     plugins: [
       require('karma-jasmine'),
       require('karma-chrome-launcher'),
       require('karma-jasmine-html-reporter'),
       require('karma-coverage-istanbul-reporter'),
-      require('@angular/cli/plugins/karma')
+      require('@angular-devkit/build-angular/plugins/karma')
     ],
     files: [
         { pattern: './node_modules/hammerjs/hammer.js', watched: false },
@@ -27,12 +27,10 @@ module.exports = function (config) {
       clearContext: false // leave Jasmine Spec Runner output visible in browser
     },
     coverageIstanbulReporter: {
-      reports: [ 'html', 'lcovonly' ],
+      dir: require('path').join(__dirname, 'coverage'), reports: [ 'html', 'lcovonly' ],
       fixWebpackSourcePaths: true
     },
-    angularCli: {
-      environment: 'dev'
-    },
+    
     reporters: ['progress', 'kjhtml'],
     port: 9876,
     colors: true,