Bring dev webpack settings a little closer to prod (#124)

config/webpacker.yml

@@ -16,7 +16,7 @@ default: &default
   cache_manifest: false
 
   # Extract and emit a css file
-  extract_css: false
+  extract_css: true
 
   static_assets_extensions:
     - .jpg
@@ -59,7 +59,7 @@ development:
     public: localhost:3035
     hmr: false
     # Inline should be set to true if using HMR
-    inline: true
+    inline: false
     overlay: true
     compress: true
     disable_host_check: true