Minor fixes

content/themes.css

@@ -216,6 +216,9 @@
 ._theme-github-dark > pre {
   color: #fff;
 }
+._theme-github-dark a {
+  color: #4493f8 !important;
+}
 ._theme-github-dark .markdown-body {
   border: 1px solid #30363d;
 }

options/settings.js

@@ -1,7 +1,7 @@
 
 var Settings = () => {
   var defaults = {
-    icon: false,
+    icon: 'default',
     theme: 'light',
     _icons: ['default', 'light', 'dark'],
     _themes: ['light', 'dark', 'auto'],