Always preload app fonts at earliest stages (#5117)

* always preload app fonts at earliest stages, fix #5019

Signed-off-by: Roman <ixrock@gmail.com>

* attempt to fix tests, clean up

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/template.html

@@ -2,13 +2,16 @@
 <html lang="en">
 <head>
   <meta charset="UTF-8">
-  <link rel="preload" href="<%= assetPath %>/MaterialIcons-Regular.ttf" as="font" crossorigin>
-  <link rel="preload" href="<%= assetPath %>/roboto-mono-nerd.ttf" as="font" crossorigin>
 </head>
 <body>
 
 <div id="app"></div>
 <div id="terminal-init"></div>
 
+<div id="fonts-preloading">
+  <i class="icons"><!--material icons--></i>
+  <i class="terminal"><!--roboto mono--></i>
+</div>
+
 </body>
 </html>