Upgrade to SugarJS 2.0.6+ and improve compatibility with recent TB
Upgrade to SugarJS 2.0.6+ and improve compatibility with recent TB

1. Upgrade to SugarJS 2.0.6+, in particular, commit 4adba2e6 at
   https://github.com/andrewplummer/Sugar.

2. For compatibility with recent Thunderbird daily builds (more
   specifically, with recent and anticipated security changes in
   mozilla-central code prohibiting `eval` and `new Function`), update
   my customization to SugarJS to obtain thge global object using
   `Cu.getGlobalForObject` rather than `return new Function('return
   this')();`.

jikamens/send-later,jikamens/send-later,jikamens/send-later,jikamens/send-later