downloadUrl support for multiWACZ + latest wabac (#407)

main menu tweaks:
- use downloadUrl for action menu download
- don't show download menu if downloadUrl is null
- don't show Archive Info if downloadUrl !== sourceUrl and in embed mode

improved loading: update to wabac.js 2.21.3

bump to 2.3.3, update CHANGES for release

package.json

@@ -1,7 +1,7 @@
 {
   "name": "replaywebpage",
   "productName": "ReplayWeb.page",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "Serverless Web Archive Replay",
   "repository": "https://github.com/webrecorder/replayweb.page",
   "homepage": "https://replayweb.page/",
@@ -18,7 +18,7 @@
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
     "@shoelace-style/shoelace": "~2.15.1",
-    "@webrecorder/wabac": "^2.21.2",
+    "@webrecorder/wabac": "^2.21.3",
     "bulma": "^0.9.3",
     "electron-log": "^4.4.1",
     "electron-updater": "^6.3.9",