Tauri improvements

[dscso]

Summerized changes:
The following changes:

• path_trav had to be removed
  • path traversal is prevented by not allowing certain characters in the filename
  • path_trav uses fs::canonicalize internally, which always fails if a file does not exist => not suited for our needs
• tauri notification replaced with mac-notification-sys
  • this has the advantage of further modification to allow the user to reply on messages directly in the notification
• file download supports progress
  • a callback can be registered when starting the download (see below)
• set badge count is supported by setBadgeCount(count: number)
  • app needs to be packaged for this to work
• this.__isApp = !this.__isBrowser was replaced with this.__isApp = window.__TAURI__ !== undefined
  • the old version was not working

await UtilitiesRuntime.requestFileDownload(
  event.file.url,
  event.file.name,
  (current, total) => console.log(`${Math.round(current/total*100)}% done`)
);

• a57ed39 adds support for deep linking. If the application is compiled and placed in the /Applications folder, Prose registers as a opener for xmpp:// URLs

[valeriansaliou]

Merged desktop branch into this one, copying comment from #68 (comment) here:

1. ✅ When application is closed by hiding, it still thinks it has focus (so it marks any unread as read) — same if minimized
2. ☑️ Make Download folder bounce when download is done
3. ☑️ Menu bar for macOS (Settings + Profile buttons, Check for Updates et al)
4. ☑️ About Prose.app window for macOS (fill it with Prose website and details)

progress

1. ✅ See if window is in focus (both web and Tauri)

UtilitiesRuntime.registerWindowFocusCallback((focus) => console.log("focus: " + focus))

[valeriansaliou]

OK after code improvements.