Limited login with email to only working platforms

public/js/init.js

@@ -52,7 +52,9 @@ socket.on("toast", (data)=>{
 })
 
 window.addEventListener('pywebviewready', function() {
+	if (window.pywebview.platform == "gtk"){
 		$('#open_login_prompt').prop('disabled', false);
+	}
 })
 
 $(function(){