fix(ui): add missing webmanifest link in head

Author: robertsLando

index.html

@@ -20,7 +20,7 @@
 		/>
 		<link rel="icon" href="favicon.ico" sizes="any">
 		<!-- <link rel="icon" href="favicon.svg" type="image/svg+xml"> -->
-	
+		<link rel="manifest" href="manifest.webmanifest">
 
 		<link rel="shortcut icon" href="favicon.ico" />