Add refresh of window when slash command used.

diff --git a/AutoInvite.lua b/AutoInvite.lua
index fb0d6b0..de3f66e 100644
--- a/AutoInvite.lua
+++ b/AutoInvite.lua
@@ -217,6 +217,8 @@ SLASH_COMMANDS["/ai"] = function(str)
     end
     AutoInvite.cfg.watchStr = string.lower(str)
     AutoInvite.startListening()
+
+    AutoInviteUI.refresh()
 end