Uncaught ReferenceError: draft_threads is not defined

[brylie]

When starting CiviWiki without any threads, I am getting an error in the browser console:

VM132:22 Uncaught ReferenceError: draft_threads is not defined
    at n.eval (eval at _.template (underscore.js:1454), <anonymous>:22:2)
    at n.template (underscore.js:1461)
    at n.render (feed.js:70)
    at n.initialize (feed.js:52)
    at n.e.View (backbone-min.js:1)
    at new n (backbone-min.js:1)
    at (index):402

This code should be written in a way that is safe for when there are no draft threads, or none assigned to the user (my draft threads).

[JOO33]

Closing due to solution proposed by #827. The JS related issues will be no longer relevant.