Add experimental option to reduce whitespace

This reduces the excessive whitespace in the RCE thread page, and fixes
space issues in the thread list on mobile.

Bug: twpowertools:130
Change-Id: Ibd0c666fa7f6a9c89814e529ef7b80541143ada2
diff --git a/webpack.config.js b/webpack.config.js
index bceb4c0..3591c97 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -42,6 +42,7 @@
     communityConsoleStart: './src/contentScripts/communityConsole/start.js',
     publicForum: './src/contentScripts/publicForum.js',
     publicThread: './src/contentScripts/publicThread.js',
+    publicThreadStart: './src/contentScripts/publicThreadStart.js',
     publicProfile: './src/contentScripts/publicProfile.js',
     publicProfileStart: './src/contentScripts/publicProfileStart.js',
     profileIndicator: './src/contentScripts/profileIndicator.js',