A previous bug on the same topic has instructions for the work around.
From Bug 841116 comment 7:
echo 'user_pref("extensions.messagingmenu.attentionForAll", true);' >> ~/.thunderbird/*default*/prefs.js
You could also create a new boolean entry in about:config (Preferences->Advanced->General->ConfigEditor)
A previous bug on the same topic has instructions for the work around.
From Bug 841116 comment 7:
echo 'user_pref( "extensions. messagingmenu. attentionForAll ", true);' >> ~/.thunderbird/ *default* /prefs. js
You could also create a new boolean entry in about:config (Preferences- >Advanced- >General- >ConfigEditor)