Fix: invalidate avatars cache entry after posting reply

After writing a reply to a thread and going back to the thread list, the
cache entry was always used, and so the avatars would be wrong if it was
the first time replying to that thread. This fixes it.

Fixed: twpowertools:23
Change-Id: Ibc77e8394bf3bf912d6b6ae11ae23a8fd4b36712
diff --git a/src/common/xhrInterceptors.json5 b/src/common/xhrInterceptors.json5
index cc0699f..6a5a1c5 100644
--- a/src/common/xhrInterceptors.json5
+++ b/src/common/xhrInterceptors.json5
@@ -5,5 +5,10 @@
       urlRegex: "api/ViewForum",
       intercepts: "response",
     },
+    {
+      eventName: "CreateMessageRequest",
+      urlRegex: "api/CreateMessage",
+      intercepts: "request",
+    },
   ],
 }