[devdocsgjs/main: 1015/1867] Fix error when no theme is set and the auto theme is not supported

[Andy Holmes <andyholmes src gnome org>]

commit 6832c1ccf68425684847435fbf5545e40829b264
Author: Jed Fox <git twopointzero us>
Date:   Mon Jan 13 19:24:06 2020 -0500

    Fix error when no theme is set and the auto theme is not supported

 assets/javascripts/app/settings.coffee | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/assets/javascripts/app/settings.coffee b/assets/javascripts/app/settings.coffee
index eb1c9289..d3fc93e1 100644
--- a/assets/javascripts/app/settings.coffee
+++ b/assets/javascripts/app/settings.coffee
@@ -46,6 +46,10 @@ class app.Settings
   get: (key) ->
     return @cache[key] if @cache.hasOwnProperty(key)
     @cache[key] = @store.get(key) ? @constructor.defaults[key]
+    if key == 'theme' and @cache[key] == 'auto' and !@darkModeQuery
+      @cache[key] = 'default'
+    else
+      @cache[key]
 
   set: (key, value) ->
     @store.set(key, value)