displaly save & quit on folder load

src/menus/pause_screen.js

@@ -1,6 +1,8 @@
 const { LitElement, html, css } = require('lit')
 const { openURL } = require('./components/common')
 const { hideCurrentModal, showModal } = require('../globalState')
+const { fsState } = require('../loadFolder')
+const { subscribe } = require('valtio')
 
 class PauseScreen extends LitElement {
   static get styles () {
@@ -46,6 +48,10 @@ class PauseScreen extends LitElement {
 
   constructor () {
     super()
+
+    subscribe(fsState, () => {
+      this.requestUpdate()
+    })
   }
 
   render () {
@@ -61,7 +67,7 @@ class PauseScreen extends LitElement {
           <pmui-button pmui-width="98px" pmui-label="Discord" @pmui-click=${() => openURL('https://discord.gg/4Ucm684Fq3')}></pmui-button>
         </div>
         <pmui-button pmui-width="204px" pmui-label="Options" @pmui-click=${() => showModal(document.getElementById('options-screen'))}></pmui-button>
-        <pmui-button pmui-width="204px" pmui-label="Disconnect" @pmui-click=${async () => {
+        <pmui-button pmui-width="204px" pmui-label="${!fsState.syncFs && !fsState.isReadonly ? 'Save & quit' : 'Disconnect'}" @pmui-click=${async () => {
         if (window.singlePlayerServer) {
           for (const player of window.singlePlayerServer.players) {
             const worlds = [singlePlayerServer.overworld]