Add option to reposition the expand thread button (CC)

This option repositions the expand thread button all the way to the left
of the thread element in thread lists (Community Console). Originally,
this button is shown in the right.

Requested at pekb/thread/67965396?msgid=91547227.

Change-Id: I10cd62998f6165ec58705fd912089119a7e0a108
diff --git a/docs/features.md b/docs/features.md
index 50ae1fc..a462046 100644
--- a/docs/features.md
+++ b/docs/features.md
@@ -125,11 +125,17 @@
 
 When this option is enabled, the "Alpha" banner in the upper-left corner of the
 Community Console is removed, and the notification dot which appears in the
-hamburguer menu when there's a new announcement is enlarged and animated so you
+hamburger menu when there's a new announcement is enlarged and animated so you
 don't miss it.
 
 ![GIF showing the improved notification dot](resources/announcement_dot.gif)
 
+### Reposition the expand thread button
+> **Option name:** _Place the "expand thread" button all the way to the left in
+the Community Console thread lists_.
+
+![Picture showing the feature](resources/reposition_expand_thread.jpg)
+
 ### Indicator dot
 > **Option names:** _Show whether the OP has participated in other threads_,
 _Show the number of questions and replies written by the OP within the last `n`