Revert "Set display property in manifest to fullscreen"

This reverts commit c7127cb.

Author: nhooyr

src/media/manifest.json

@@ -2,7 +2,7 @@
 	"name": "code-server",
 	"short_name": "code-server",
 	"start_url": ".",
-	"display": "fullscreen",
+	"display": "standalone",
 	"background-color": "#fff",
 	"description": "Run VS Code on a remote server.",
 	"icons": [{