Disable in all tmm commands

The tmm package implements its own completion mechanics, which
ido-ubiquitous interferes with. Currently, disabling on "tmm-menubar" is
sufficient, but it is safer to just disable it for the entire package,
since there's no reason to try to make it work anyway.

ido-ubiquitous.el

@@ -277,7 +277,8 @@ specific commands or functions, set appropriate overrides in
     ;; https://github.com/DarwinAwardWinner/ido-ubiquitous/issues/37
     ;; Org and Magit already support ido natively
     (disable prefix "org-")
-    (disable prefix "magit-"))
+    (disable prefix "magit-")
+    (disable prefix "tmm-"))
   "Default value of `ido-ubiquitous-command-overrides'.
 
 You can restore these using the command `ido-ubiquitous-restore-default-overrides'.")