Minor style fix.

Implement Google's recommendation for the fonts loading.
See https://web.dev/font-display/?utm_source=lighthouse&utm_medium=unknown

assets/css/um-fonticons-fa.css

@@ -7,6 +7,7 @@
     url("../font/fontawesome-webfont.woff?v=4.2.0") format("woff"),
     url("../font/fontawesome-webfont.ttf?v=4.2.0") format("truetype"),
     url("../font/fontawesome-webfont.svg?v=4.2.0#fontawesomeregular") format("svg");
+	font-display: swap;
   font-weight: normal;
   font-style: normal;
 }

assets/css/um-fonticons-ii.css

@@ -7,6 +7,7 @@
     url("../font/ionicons.woff?v=2.0.0") format("woff"),
     url("../font/ionicons.ttf?v=2.0.0") format("truetype"),
     url("../font/ionicons.svg?v=2.0.0#Ionicons") format("svg");
+	font-display: swap;
   font-weight: normal;
   font-style: normal;
 }

assets/css/um-raty.css

@@ -7,6 +7,7 @@
   src: url("../font/raty.svg#raty") format("svg");
   src: url("../font/raty.ttf") format("truetype");
   src: url("../font/raty.woff") format("woff");
+	font-display: swap;
 }
 
 .cancel-on-png, .cancel-off-png, .star-on-png, .star-off-png, .star-half-png {
@@ -28,7 +29,7 @@
 }
 
 .star-on-png,
-.star-half-png 
+.star-half-png
 {color: #ffbe32}
 
 /* Icons */