MC-16046: Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading

- Make font-display auto by default;

Author: adifucan

lib/web/css/source/lib/_typography.less

@@ -12,7 +12,7 @@
     @font-path,
     @font-weight: normal,
     @font-style: normal,
-    @font-display: swap
+    @font-display: auto
 ) {
     @font-face {
         font-family: @family-name;