[bug] fix shade intial render opacity

Author: zombieFox

src/css/shade.css

@@ -5,6 +5,7 @@
   left: -1em;
   width: calc(100% + 2em);
   height: calc(100% + 2em);
+  opacity: 0;
   transition: opacity var(--layout-animation-speed-fast) ease-in-out, background-color var(--layout-animation-speed-fast) ease-in-out;
   z-index: var(--z-index-shade);
 }

src/js/version.js

@@ -1,6 +1,6 @@
 var version = (function() {
 
-  var current = "3.23.0";
+  var current = "3.23.1";
 
   var compare = function(a, b) {
     var pa = a.split(".");

src/manifest.json

@@ -2,7 +2,7 @@
   "name": "nightTab",
   "short_name": "nightTab",
   "description": "A neutral new tab page accented with a chosen colour. Customise the layout, style, background and bookmarks in nightTab.",
-  "version": "3.23.0",
+  "version": "3.23.1",
   "manifest_version": 2,
   "chrome_url_overrides": {
     "newtab": "index.html"