quartermaster/DB5 — pull request #9 by scompt (2013-11-17 18:36:58+00:00)
Title: Keep a strong reference to the parent theme

If the `VSThemeLoader` goes out of scope while you have a reference to a
`VSTheme`, then the only reference to the parent theme will be through the
weak `parentTheme` property. This will eventually get cleaned up, leaving you
with an empty reference and no theme inheritence.

The fix is to make the `parentTheme` property a strong reference.