Add extension icon badge to injected components

Fixes: #8
Change-Id: Id1d0ae4a3da057fb06f5137be2271e293d8f0cd4
diff --git a/src/injections/ccdarktheme.css b/src/injections/ccdarktheme.css
index 8208f05..6c15b0d 100644
--- a/src/injections/ccdarktheme.css
+++ b/src/injections/ccdarktheme.css
@@ -8,7 +8,7 @@
   --TWPT-card-border: #5f6368;
   --TWPT-subtle-border: #383735;
   --TWPT-link: #8ab4f8;
-  --TWPT-thread-read-background: rgba(255, 255, 255, 0.08);
+  --TWPT-thread-read-background: rgba(255, 255, 255, .08);
   --TWPT-drawer-background: #2d2e30;
 }