fix: bundle stylesheets with scss-bundle

fixes: #179

package.json

@@ -18,8 +18,10 @@
     "build": "run-s build:*",
     "build:mouse-dispatcher": "ng build --prod @scion/mouse-dispatcher",
     "build:dimension": "ng build --prod @scion/dimension",
-    "build:viewport": "ng build --prod @scion/viewport && cp -r projects/scion/viewport/src/theme/** dist/scion/viewport",
-    "build:workbench": "ng build --prod @scion/workbench && cp -r projects/scion/workbench/src/theme/** dist/scion/workbench",
+    "build:viewport": "ng build --prod @scion/viewport",
+    "postbuild:viewport": "scss-bundle -e projects/scion/viewport/src/theme/_scrollbar.scss -o dist/scion/viewport/scrollbar.scss",
+    "build:workbench": "ng build --prod @scion/workbench",
+    "postbuild:workbench": "scss-bundle -e projects/scion/workbench/src/theme/_theming.scss -o dist/scion/workbench/theming.scss",
     "build:workbench-application-platform.api": "ng build --prod @scion/workbench-application-platform.api",
     "build:workbench-application-platform": "ng build --prod @scion/workbench-application-platform",
     "build:workbench-application.core": "ng build --prod @scion/workbench-application.core",
@@ -113,6 +115,7 @@
     "@types/jasminewd2": "2.0.6",
     "@types/node": "10.12.18",
     "codelyzer": "5.1.0",
+    "cross-env": "5.2.0",
     "jasmine-core": "3.4.0",
     "jasmine-spec-reporter": "4.2.1",
     "karma": "4.1.0",
@@ -126,12 +129,12 @@
     "protractor": "5.4.2",
     "puppeteer": "1.13.0",
     "rxjs-tslint": "0.1.7",
+    "scss-bundle": "3.0.1",
     "ts-node": "8.2.0",
     "tsickle": "0.35.0",
     "tslint": "5.12.1",
     "typescript": "3.4.5",
-    "wait-on": "3.2.0",
-    "cross-env": "5.2.0"
+    "wait-on": "3.2.0"
   },
   "repository": {
     "type": "git",

scss-bundle.config.json

@@ -0,0 +1,6 @@
+{
+  "bundlerOptions": {
+    "rootDir": ".",
+    "logLevel": "info"
+  }
+}