Fix handling of favicon

Follow the blog of https://blog.ghkk.net/post/how-to-favicon-in-2021-six-files-that-fit-most-needs/

* Remove everything about mstile.
* Regenerate favicon using SVG file from
  https://commons.wikimedia.org/wiki/File:OOjs_UI_icon_academic-progressive.svg
  with minor tweaks in SVG viewBox.
* Provide .svg, .ico, 32x32, 192x192, 512x512, and apple 180x180 .png icons.

This commit closes: #2337 .

_includes/head/custom.html

@@ -2,26 +2,14 @@
 
 <!-- start custom head snippets -->
 
-<link rel="apple-touch-icon" sizes="57x57" href="{{ base_path }}/images/apple-touch-icon-57x57.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="60x60" href="{{ base_path }}/images/apple-touch-icon-60x60.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="72x72" href="{{ base_path }}/images/apple-touch-icon-72x72.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="76x76" href="{{ base_path }}/images/apple-touch-icon-76x76.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="114x114" href="{{ base_path }}/images/apple-touch-icon-114x114.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="120x120" href="{{ base_path }}/images/apple-touch-icon-120x120.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="144x144" href="{{ base_path }}/images/apple-touch-icon-144x144.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="152x152" href="{{ base_path }}/images/apple-touch-icon-152x152.png?v=M44lzPylqQ">
-<link rel="apple-touch-icon" sizes="180x180" href="{{ base_path }}/images/apple-touch-icon-180x180.png?v=M44lzPylqQ">
-<link rel="icon" type="image/png" href="{{ base_path }}/images/favicon-32x32.png?v=M44lzPylqQ" sizes="32x32">
-<link rel="icon" type="image/png" href="{{ base_path }}/images/android-chrome-192x192.png?v=M44lzPylqQ" sizes="192x192">
-<link rel="icon" type="image/png" href="{{ base_path }}/images/favicon-96x96.png?v=M44lzPylqQ" sizes="96x96">
-<link rel="icon" type="image/png" href="{{ base_path }}/images/favicon-16x16.png?v=M44lzPylqQ" sizes="16x16">
-<link rel="manifest" href="{{ base_path }}/images/manifest.json?v=M44lzPylqQ">
-<link rel="mask-icon" href="{{ base_path }}/images/safari-pinned-tab.svg?v=M44lzPylqQ" color="#000000">
-<link rel="shortcut icon" href="/images/favicon.ico?v=M44lzPylqQ">
-<meta name="msapplication-TileColor" content="#000000">
-<meta name="msapplication-TileImage" content="{{ base_path }}/images/mstile-144x144.png?v=M44lzPylqQ">
-<meta name="msapplication-config" content="{{ base_path }}/images/browserconfig.xml?v=M44lzPylqQ">
-<meta name="theme-color" content="#ffffff">
+<!-- favicon from https://commons.wikimedia.org/wiki/File:OOjs_UI_icon_academic-progressive.svg -->
+<link rel="apple-touch-icon" sizes="180x180" href="{{ base_path }}/images/apple-touch-icon-180x180.png"/>
+<link rel="icon" type="image/svg+xml" href="{{ base_path }}/images/favicon.svg"/>
+<link rel="icon" type="image/png" href="{{ base_path }}/images/favicon-32x32.png" sizes="32x32"/>
+<link rel="icon" type="image/png" href="{{ base_path }}/images/favicon-192x192.png" sizes="192x192"/>
+<link rel="manifest" href="{{ base_path }}/images/manifest.json"/>
+<link rel="icon" href="/images/favicon.ico"/>
+<meta name="theme-color" content="#ffffff"/>
 <link rel="stylesheet" href="{{ base_path }}/assets/css/academicons.css"/>
 
 

images/manifest.json

@@ -1,41 +1,15 @@
 {
-	"name": "Minimal Mistakes",
+	"name": "OOjs UI icon academic-progressive",
 	"icons": [
 		{
-			"src": "\/images\/android-chrome-36x36.png?v=M44lzPylqQ",
-			"sizes": "36x36",
-			"type": "image\/png",
-			"density": 0.75
-		},
-		{
-			"src": "\/images\/android-chrome-48x48.png?v=M44lzPylqQ",
-			"sizes": "48x48",
-			"type": "image\/png",
-			"density": 1
-		},
-		{
-			"src": "\/images\/android-chrome-72x72.png?v=M44lzPylqQ",
-			"sizes": "72x72",
-			"type": "image\/png",
-			"density": 1.5
-		},
-		{
-			"src": "\/images\/android-chrome-96x96.png?v=M44lzPylqQ",
-			"sizes": "96x96",
-			"type": "image\/png",
-			"density": 2
-		},
-		{
-			"src": "\/images\/android-chrome-144x144.png?v=M44lzPylqQ",
-			"sizes": "144x144",
-			"type": "image\/png",
-			"density": 3
+			"src": "/images/favicon-192x192.png",
+			"sizes": "192x192",
+			"type": "image/png"
 		},
 		{
-			"src": "\/images\/android-chrome-192x192.png?v=M44lzPylqQ",
-			"sizes": "192x192",
-			"type": "image\/png",
-			"density": 4
+			"src": "/images/favicon-512x512.png",
+			"sizes": "512x512",
+			"type": "image/png"
 		}
 	]
 }