When disabling a theme, faces are not updated accordingly.

[ustun]

Previously, we were only updating faces when we enable themes.

We need to update the faces whenever a theme is disabled, otherwise after disabling a dark theme like molokai, the background colors are still black in the default emacs theme.

Expected behavior

When disabling a theme, backgroud colors of error reports etc should be re-calculated.

Actual behavior

Previous theme's colors are taken into account when disabling a theme.

Steps to reproduce the problem

Enable a theme on emacs startup. (possibly a dark one)
Start cider.
Disable theme.
Run a failing test.
The background color for tests still are like that of the disabled theme.

Before

After

Environment & Version information

CIDER version information

;; CIDER 0.15.0snapshot (package: 20170506.1322), nREPL 0.2.12
;; Clojure 1.8.0, Java 1.8.0_45

Lein/Boot version

Leiningen 2.7.1 on Java 1.8.0_45 Java HotSpot(TM) 64-Bit Server VM

Emacs version

GNU Emacs 25.2.1 (x86_64-apple-darwin16.5.0, Carbon Version 157 AppKit 1504.82) of 2017-04-28

Operating system

macOS