refactor(ui-spacing): migrate to the new DI architecture

With this migration we also get for free that this option is now
dynamic, so changing it will automatically update the applied styles.

Bug: twpowertools:176, twpowertools:61
Change-Id: Icac4f829745a06c95439931955be6c52c7303482
diff --git a/webpack.config.js b/webpack.config.js
index 1eb49ba..0413c5f 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -47,7 +47,7 @@
         './src/entryPoints/communityConsole/contentScripts/start.ts',
     publicForum: './src/contentScripts/publicForum.js',
     publicThread: './src/contentScripts/publicThread.js',
-    publicThreadStart: './src/contentScripts/publicThreadStart.js',
+    publicThreadStart: './src/entryPoints/twBasic/thread/start.ts',
     publicGuide: './src/contentScripts/publicGuide.js',
     publicGuideStart: './src/contentScripts/publicGuideStart.js',
     publicProfile: './src/contentScripts/publicProfile.js',